I'd like to nominate geelong6 - I tried to do so in the original thread but my post is still hung up in moderation.
He's Level 28 now, should advance soon. I've met him only once but it was in my first Blitz game (and my first game on WGT with folks I don't know). If I had been a fresh WGT newbie, he'd have come off as a fantastic ambassador for WGT. Great guy, very social - winning or losing, he was cheering guys on and making the game more enjoyable.
Merry Christmas!