CBR did a similar poll for "done in one" stories for comic books (not Graphic Novels) last month, and here were the results:
50. "Maybe Next Year" Peter Parker: Spider-Man #33 (2001)
49. "With Great Power Comes Great Coincidence" Deadpool #11 (1997)
48. "Ghosts" Batman: Ghosts Legends of the Dark Knight Halloween Special #1 (1995)
47. “Of Thee I Sing” Hitman #34 (1998)
46. “Another Cold Morning” Transmetropolitan #8 (1998)
45. “Wounded Wolf” Uncanny X-Men #205 (1986)
44. “Nobody Dies” Flash #54 (1991)
43. “Calliope” Sandman #17 (1990)
42. “Judgment Day” Weird Fantasy #18 (1952)
41. “24 Hours” Wolverine #10 (1989)
40. “Terror in a Tiny Town” Fantastic Four #236 (1981)
39. “Last Night” Marvel Fanfare #15 (1984) (Note: the actual title was "that night." It's a BWS story about The Thing.)
38. “The Amazing Screw-On Head” (2001)
37. “Who Is Donna Troy?” New Teen Titans #38 (1983)
36. Spider-Man versus Wolverine (1987)
35. “No Evil Shall Escape My Sight!” Green Lantern #76 (1970)
34. “In Dreams” Astro City #1 (1995)
33. “The Autobiography of Bruce Wayne” The Brave and the Bold #197 (1983)
32. “Flashing Back” Flash #0 (1994)
31. “Confessions” Ultimate Spider-Man #13 (2001)
30. “The Good, The Bad and the Uncanny” Silver Surfer #4 (1968)
29. “The Joker’s Five-Way Revenge” Batman #251 (1973)
28. “Master Race” Impact #1 (1955)
27. “There Is No Hope In Crime Alley” Detective Comics #457 (1975)
26. "The Fantastic Four" Fantastic Four #1 (1961)
25. “A League Divided” Justice League of America #200 (1981)
24. “Captain America Joins … the Avengers!” Avengers #4 (1964)
23. “To Kill a Legend” Detective Comics #500 (1980)
22. “Demon” Uncanny X-Men #143 (1980)
21. “The Pact” New Gods #7 (1971)
20. “Roulette” Daredevil #191 (1982)
19. “Second Genesis” Giant-Size X-Men #1 (1975)
18. “Even an Android Can Cry” Avengers #58 (1968)
17. “A Midsummer Night’s Dream” Sandman #19 (1990)
16. “X-Animations” X-Factor #87 (1992)
15. “Silent Interlude” G.I. Joe #21 (1984)
14. “In Mortal Combat With … the Sub-Mariner” Daredevil #7 (1965)
13. “Ramadan” Sandman #50 (1993)
12. “Return to Krypton” Superman #141 (1960)
11. “Pizza Is My Business” Hawkeye #11 (2013)
10. “The Kid Who Collects Spider-Man” Amazing Spider-Man #248 (1983)
9. “What’s So Funny About Truth, Justice and the American Way?” Action Comics #775 (2001)
8. “Men of Good Fortune” Sandman #13 (1989)
7. The Batman Adventures: Mad Love #1 (1993)
6. “The Anatomy Lesson” Swamp Thing #21 (1983)
5. “Spider-Man!” Amazing Fantasy #15 (1962)
4. “The Coyote Gospel” Animal Man #5 (1988)
3. “This Man, This Monster” Fantastic Four #51 (1966)
2. “The Nearness of You” Astro City 1/2 (1997)
1. “For the Man Who Has Everything” Superman Annual #11 (1985)
I have read twelve of these.