My nomination?
No question.
THX 0477 , the Grand Awesome Marshall of the League of Awesomeness.
Hands down.
Why?
One must only look at his track record. Specifically, look at anything that he’s written; I personally have never been disappointed.
If one needs a nominating ficlet or series, this would have to be it: Pretty Things, http://ficlets.com/stories/28740

The rest is self-explanitory.
He’s just The Man.