They'd probably be surprised to see this, but GAME_KING, InfernoKid-Sandstorm, Kanaloa, and Dankerson were the most influential on me in terms of what "works" and what doesn't in terms of memes/meme comments, and how to behave on the site. Those are the users I remember looking up to most when I was first starting and trying to figure things out.
Honestly, I think you can learn something from everybody, though (ok, well almost everybody).