Personally...mm
Twothumb, both of 'em. Characters did a LOT ingame, player did even more out of game.
Brown Moses, hell of a lot of good, indepth and open storylines, involving a lot of guilds and interaction.
Paladis, didnt seem to do a lot ingame, yet accomplished a lot not only for his own guild, but for opening up a lot of storylines involving lots of guilds, repeatedly. 9 from 10 times, the stuff starting with him would end up having him as the little devil on your shoulder...egging you on, but not getting noticed.
Sweet Agony, Noxin, Wildcat, Duo, Hanse Davion, Chucky, Shadowstar, Mercutio...purely for their PvP ability...and incorporating a lot of RP into it and from their ability solely. Many wars have started and ended through them...many stories and beyond had too. (they aint listed in any order).
Choma, Gorchak, Seriya D'lacey they were always around, yet hardly seemed to be noticed really...even more recognition for the work put into one of the best and more popular tavern nights, the five aces.
Decardo, pain in the neck (sometimes literally

) but always stood onto the same RP context and never moved from it.
Klion D'gar for leading one of the biggests and oldest guilds on the server.
Raistlin....and his stick, complete arse...pain in the neck and annoying...and RP'd having a talking stick superbly. Not too shabby for a finn.
Fizzit Von'Sah...caused so much drama ICly and people took it to the OOC level...was superb.
Callum Fitz...purely for keeping and trying to keep that all gms board good and proper (hopefully..maybe still doing so) as well as producing some of the best storylines going..even more importantly, often supporting others ideas while others stand and mock.
Ikus...the original and best...even better whilst on his guard character drunk and beating others in (its not ale! honest! *hic*)
Kaelyn...never ever before have I seen a guard take so many beatings, in so many different ways, repeatedly...and never ever EVER to my knowledge whined, complained, quit her job ICly and OOCly...she made my last few months many years back...a pure pleasure whilst in Trinsic.
Theres many others...that "could" get mentioned...all the GM's past and present for running their guilds...all the rogues and brigands and guards and armies and peasants..but those above are the ones who've stood out the most for me....whether in the game or out of it. Whether through their actions of running a guild were superb brilliant and beyond belief..while their actions and behaviour outside of the game differed so badly that I felt...was unneeded and not necessary.
Overally...think that all the people who made me smile while playing the game were and are still legends. Even more so if they made others smile too and buggered if listing all those tbh.