You may be looking for the glossary term Classic, which is a jargon for a specific genre of fanwork that is canon compliant or ignores certain episodes or seasons.
Online fandoms develop so quickly that a fanwork can be labeled "classic" within months.
How Are Classics Defined?
Number of recs?
Number of times it shows up in fannish discussions?
The popularity of the fanwork's creator?
The pairing or subject matter?
The fanwork's length?
The fanwork's genre?
Do fans talk about it because the fanworks because of its general excellence or because it rocked some fannish boats?
Fanworks that are consistently mentioned by mainstream media sources?
Some Examples of Fandom Classics
- Lessons in Cartography by crazy_like_a
- Bizarro Universe by Leah Rosenthal and Annie Wortham
- From the Log of the Hellhound by Katarina Larkin and Susanne Tilley
- Rhyme and Reason by Michael "Questy" Demcio
- Under the Bridge by John Nowak
- Death Of A Comedian by The J.A.M. (requires three more fics to be read first; see the fandom article)
- Of Mice and Mayhem by fish
- The Rangerillion by Sir Salazar Ovid Spumoni
- Catapult by Ella
- Devil Angel by Aspen
- Lived by Amanda Dupuis
- Tulsa 74132 by Sarah, Laurie and Melissa
- Zac Says Tay Still Wets The Bed by Nick
- The Paradigm of Uncertainty by Madlori
- The Draco Trilogy by Cassandra Claire
- The Shoebox Project by Lady Jaida and Rave
- Stealing Harry by Sam Starbuck
- Harry Potter and the Methods of Rationality by Eliezer Yudkowsky
- World Ain't Ready by idiopathicsmiles
- Fallout: Equestria by Kkat
- These Inconvenient Fireworks by mdasch and everydayslike
- Wild and Unruly by 100percentsassy and gloria_andrews
- Room 317 by lellsy
- The Killing Type by protagonist_m
- May You Enjoy Your New Life by aimmyarrowshigh
- Fading by tothemoonmydear
- Full Circle by Killa
- Courts of Honor by Syn Ferguson
- This Deadly Innocence, Or The End of the Hurt/Comfort Syndrome by Leslie Fish
- Nine Rings of Vos by sanjuno
- Classics (or, Your Fanfic Education is Not Complete Until You've Read ...) - a list of "must-read" The X-Files stories posted at X-Files Lost & Found
- Oklahoma, by Amperage and Livengoo
- Iolokus Series by RivkaT and MustangSally
- Ghosts by torch
- Closer by Killa and TJonesy (Star Trek: TOS)
- The Rose by Kendra Hunter and Diana Barbour (Starsky & Hutch)
- Us by Lim (multi-fandom, meta)
- How Fanfiction Makes Us Poor by cupidsbow (multi-fandom)
- Another Addict Raves About K/S by Joanna Russ (Star Trek: TOS)
- Open Letter to Star Wars Fans by the Duncans by Tracy Duncan & Nancy Duncan (Star Wars)
- The good old days before google were dark and involved horses by seperis (multi-fandom)