I would like to nominate Roadkiller!
What he's written about me (I almost cried... was that neccessary?) is true for him as well.
Plus, when he answers questions, he's posting links, which I try to avoid. So he's the one who actually provides all the clickable help... I mean, let's face it: Noobs don't want some bright-yellow warning sign to write them a ten-line essay. They want a green Spartan and they want him to give them the link.
I would also go ahead and nominate you, Nintendude, for a whole bunch of reasons (helpfulness, being nice, being absolutely devoid of fear in your quest for a world record, organising things like the secret santa or this and even giving away prizes and probably more noteworthy stuff that I've missed) - but sadly, I somewhat doubt that you would pick yourself :-(