I don't have an MVP list but there are a few users that I associate things with:
Blazer - Rest in Peace
3GT - Yes I am f'ing serious
WnE - OG PressManCoverage
BoR - mediocre
GTMom - boomer hardlegging
Ish - timeless avatar, named after beloved "garbage collector"
GTMensLax&SoccerD1Soon! - admire the dedication in the name
coit - repost
gtphd - graduate athletic fees and bragging
jts - jj reddick, cubs fan
Corndog - pittsburgh, mustard smile on corndog
Akinji - tailgates, dirty beard on bear
Elcidbuzzingfan - avatar from bloody keyboard slamming gif
Rodzilla - cheering gif by the sad kid
GTBJW/BravoWhiskey - battle of 222
wracerx - "list" threads, racer x from speed racer