Noam Chomsky is probably the closest thing to a modern Aristotle that exists. His writing revolutionized how I view the world.
Matt Taibbi is who I would be if I stayed in journalism full time -- at least he's who I would aspire to be like. He hasn't been writing much lately, at least political stuff.
I befriended Zaldy Dandan because I really think he tells it like it is. I know he has his detractors, but I like his stuff and think he definitely inspires thought.
While I seldom agree with him, I have to give props to Bruce Bateman for provoking thought and being intellectually consistent.
The rules are here on Angelo's page. I don't expect Noam or Matt to participate, but it would be cool if they did.