Kristis133, SainTD, s7ing, Tman, iRookie, Snook, Tay, Shockey, Diamond, and imapirate are names that come to mind for me.

These members have demonstrated mastery in several mods, not just one gimmick mod. I know the two most popular dueling mods today are aikidobigdojo and boxshu_mushu, but just because you are good at one or both of those mods doesn't mean you're worthy of being called "the best."