We've probably forgotten some, but this is a somewhat updated list, grouped by length.
Short Story
1. hate sex of various kinds
2. Ladies’ Man: Heep gets drunk and tells David he's never wanted a woman
3. Heep wants david but knows it’s impossible
4. Cheek-ache: post slap fic
5. Heep comes back to england when agnes has just died and david cries on him
6. heep's afraid of damnation
7. rp/casual sex at wickfield's
8. Uriah and Agnes do get married for practical reasons, don't want sex with each other
9. Uriah comes over to David's new cottage pre Dora marriage and is passive aggressive and nasty
10. Artless: David notices the layers of Uriah's accent while they're having sex
11. "Hero-hotic"
12. Inconstant Heart: David cheats on Agnes a lot
13. Heliotropism: David cheats on Uriah
14. In Vino Very Annoying: Uriah gets drunk due to Wickfield on David's 15th bday and they have sex
15. Improperly Done: David drops an H
16. Drubbing It In: Uriah asks David to physically punish him when he makes a mistake learning law, because that's what he's used to
17. Lickspittle: Uriah has actually never been physically punished in school (I don't remember where we went with this idea tho, but I do remember that it had to do with humiliating David)
18. David meets Uriah when drunk, rambles about pirate Uriah, they have out of control roleplay
19. Sympathies of Temperament: Steerforth charms Uriah against Uriah’s will with his ‘oh I want to control everything vital to David’ bs
20. Uriah likes that David’s a brat.
21. Uriah thinks he and David are playing a game, trying to steal more of each other’s lives
22. Dandyism: Uriah helps David dress nicely (potentially encounters david while he’s uselessly parading in his nice clothes for Dora, but not running into her)
23. Uriah watches David, eats a meal “with” him while not with him, pines hatefully
24. David follows Uriah and he’s not doing his servile thing and seems almost likeable
25. Uriah loves spending david’s money, buys himself a suit, thinks of it as David’s suit, it ends up being all he has
26. Now time hath wasted me: One where David gets Uriah and Agnes to play games with him. It’s sad. Agnes points out that Uriah had to work late after and David furiously wants to give the time back.
27. Uriah likes to stage manage, sits David in a specific chair, etc
28. In Australia, Heep converts to catholicism in order to have to go to church less. Goes to confession and describes his sins with the greatest relish possible.
29. Modern AU where they fuck during David’s bachelor party
30. Aunt Betsey and Mrs. Heep are both witches and know this about each other. One day Betsey just turns Uriah into an eel and he flops around. (E: This is a weird kink, elviaprose.)
31. David joins the Navy after money’s stolen and is never quite the same, Uriah is sad about it
32. Uriah’s mom was insane over Uriah’s dad, stole his food bowl, etc
33. Modern AU where they meet on a train, Uriah is at his most obnoxious when they talk, then can’t stop himself from taking pictures of sleeping David
34. Heep starts talking to Agnes at a party, trying to get her to talk about how much she wants David/torture her with that, ends up twisting himself into a weird knot and running off to an empty room. David goes in there to try to fetch him so he can leave, they end up having sex.
35. They are hot modern day lesbians and Uriah looks like La Roux or Annie Lennox (M: I feel bad about how much I want this)
36. David tells him he’s boring, he freaks out, eviscerating empathy one
37. Uriah does share the bed, David wakes up to cuddling he initiated but Uriah being weeeeird about it
38. Crossover with Degrees and book
39. Degrees fic where Uriah DETERMINED to buy out a sex shop as a wedding present
40. a fic where David is fucking Adams and Uriah finds out
41. Maldon
42. One where just kissing is hugely charged
43. that'd be a cute one where David comes to uriah for filthy hatesex and uriah's just like twee and david's disappointed, and then david's the one to like, suggest vile shit and uriah's like, scandalized but interested
44. David gets caught with Uriah and Uriah gets fired!!
45. Old roman bath swimming
46. maybe at some point david could try to silent treatment him
47. David might be like--I think in your heart you are a FULL BORE romantic, you want to live and die for someone, you're passionate and obsessive, and you hate yourself and enjoy punishing yourself and THRIVE off hate/don't know what to do without that driver, so you want to marry someone you don't love for money, to feel the degradation of it always and to torture yourself with a true object you cannot have
48. you could also do a modern AU where Uriah tells David that he’s always loved Agnes and all his evil plans, etc, and David’s like-think fast, David-oh, got it! this will work: “But I love you! I thought you always knew. Agnes has known for years, she’d never take you from me”
49. relationship or casual sex fic where David found sucking him off really reassuring and like, asks to do it or is vv grateful when uriah offers if he's stressed/worried, and can like, skip off to a meeting feeling calmed after having done it
50. Victorian setting: Uriah assumes he and David will continue to fuck but will both marry, David’s like omg you are ICE COLD
51. Tease fic
52. she's like no david don't throw yourself on the altar of his blatant interest in you to try to buy him off, and david's like ????, and she's like DON'T FUCK HIM FOR MY SAKE
53. ghost/undertaker
54. David's really disturbed and even angered by Uriah liking him so much
Long ‘Short’ Story/Novella
1. Ancient Enemy: Heep comes back when they're old
2. Heep changes David into a woman
3. BDSM verse (sub!David)
4. BDSM verse (dom!David)
5. Most Desired Outcome: david's like what would make you leave agnes alone&heep is like wellll
6. wickfield dies early
7. Wear You Like A Charm: abo fake relationship
8. prison fic
9. prisoner/warden
10. black magic ideas
11. The Rake and the Racketeer: heep steerforth bodyswap
12. Impersonal History: unreliable narrator david
13. Drink Deep: Love potion
14. David follows Uriah and catches him seeing a male prostitute (nice reaction and bad reaction)
15. A Young Gentleman Meeting Your Specifications Exactly: David becomes a (casual, temporary) male prostitute when he loses his fortune, pimp sets him up with Uriah
16. Fandom AU!!
17. The Personal History, Misadventures, Experience and Certain Cutting Observations of Uriah Heep the Younger of Canterbury (Which He Never Meant to Be Read By Another Living Soul on Any Account): Uriah keeps a diary, and it's amazing. David finds it, reads it, trades favors for more volumes
18. Self-Immolation: Uriah keeps a diary and it's messy. David burns it, Uriah devastated.
19. More than kin, less than kind: David and Uriah are cousins and Uriah wants to marry him
20. Edmund Effect: Uriah is Wickfield's bastard son
21. I’ll Have The Law On You: David’s dad and Uriah’s dad draw up a marriage contract for them before David’s even born. Uriah treasures it and/or springs it on David.
22. Uriah takes David under his wing, David is his devoted protege
23. Pirate AU
24. Uriah writes a My Secret Life type thing with a David-esque POV character (or maybe David writes it. But there should be a My Secret Life type fic for this)
25. Dora is obliviously awful to Uriah, David is deeply shamed (this was an idea for the lovely dad one but also we branched off in other ways)
26. One of Uriah’s old schoolmates makes a delivery and is terrified of him, tells David about what a terrifying person he was (also turns out Uriah and this guy used to fuck)
27. Uriah sets things up so David can board with him and his mother instead of Wickfield
28. David-Uriah body swap
29. Modern AU, Uriah needs someone to pretend to be his boyfriend, Micawber finds David to do it for him, David is AMAZING in his Davidness
30. Modern AU where they are lawyers on opposite sides of a case and had sex when they were 18/22-23. David left for college without even telling Uriah because he didn’t think they were really in a relationship and Uriah was heartbroken.
31. Strangers on a Train fusion, canon setting but where they never met. David must kill Wickfield in exchange for Uriah driving Murdstone to suicide.
32. Groundhog day
33. The one where David accidentally leads him on/fucks him over
34. The inverse one where Uriah steals the money but coaxes him into a relationship but then it comes out
35. Little Mermaid
36. high/low sidhe
37. Australia, Uriah thinks he’s over him
38. Australia, Uriah TOTALLY PREPARED FOR HIS VISIT
39. Post novel, Uriah forges tons of letters and frames David for sodomy with Steerforth. David moves to Australia to escape the public eye after he’s acquitted to Uriah’s absolute JOY.
40. David tries to make Uriah into a prince charming for gay lifestyle a magazine feature
41. Uriah makes his mom turn him into a beautiful woman
42. Uriah is a photographer
43. David can’t get uriah out of his head so he has sex with him; uriah is like omg this makes so much sense, my life is permanently changed, and David’s like--ok, so that was a good one time thing.
44. Bible AU where David IS King
45. Uriah plans B&As wedding
46. BABYSWAP
47. Modern AU: Uriah has married Wickfield for his money and Wickfield tells David to take care of him
48. Tattoo au
49. Warden fic
50. David went to prison subconsciously to see him/goes to Australia after him bc he’s WAY more interested than he’s aware of and really represses it
51. Davida widow
52. Davida possibly pregnant by S
53. always-a-girl-Uriah, like Sally Brass
54. Trans David one
55. Governess Bathsheba/Davida
56. Two female writers
57. Uriah's dad was lovely and David is obsessed with hearing about them and wants to pretend they're brothers/tell each other EVERYTHING idea
58. Venom
59. tour manager
60. David dies and only Uriah can see his ghost
61. Secretary Uriah
62. In the far future David’s agent INSISTS on holo or robot David’s for readings like people can buy one and Uriah’s the designer and David’s like how did you retrain?! And Uriah’s like legally barred from legal database management after the Incident
63. Beltane
64. David as a VERY bossy sub
65. Uriah works on David’s paper
66. Magical doppleganger (David)
67. Scheherazade
68. Uriah has to be David's lawyer
69. David/Uriah nasty divorce in past
70. very YOUNG Davida/Uriah marriage, divorce
71. Hypnosis prisoner reform
72. Other hypnosis ideas, Trilby one
73. David and Uriah travel around Europe together after Explosion
74. Uriah tutoring Davida
Novel/Long Novella
1. installment wars
2. heep is a great actor
3. australia visit where heep is super prosperous. He runs a huge crime ring and has a houseboy who he tries to get David to fuck.
4. Australia visit where David decides to write a novel based on heep
5. Victorian Hogwarts
6. Messers Steerforth, Copperfield & Heep, Esquires: law threesome
7. Setting Up House: Uriah ends up helping David manage his household via letter while he's married to Dora
8. Pen-pals
9. Tenth Muse: Uriah does crimes based on notes in David's books (Canterbury Court Registry, potentially bank fraud)
10. Heep ends up SUPER RICH (wacky Little Dorrit style secret inheritance) and wants David to love him. David is clueless.
11. Modern AU, David does a sugar daddy type gig to pay for college
12. Soulmate AU. They are soulmates and have to live together as husband and husband for a year before they can split. Uriah calls David his other self and it is the most delicious crack.
13. apocalypse where the full cast is there and Uriah is King
14. Apocalypse pet one
15. Doll museum
16. Crossover with b/a
17. 7up
18. Porn company
19. ‘Not over it’ long letter writing
20. Piece of the Action: Uriah in charge of a London crime syndicate
21. David fakes his death, uriah finds and kidnaps him
22. Travel journalist David Copperfield has bagged the honeymoon trip of a lifetime. The trouble is, after his world imploded two weeks ago, he’s now desperately in need of a husband!-fun if David’s just like on social media like anyone want to come with me? And Uriah’s like “oh, I’d LOVE to”
23. Bad Therapist (novel?)
24. Viking bullshit
25. Mutiny China Fic
26. Australian independence
27. Prison labour convict program
28. Rome AUs