Pat Buchanan, Bob Novak, Al Hunt, and Mark Shields!
My absolute all time favorite!!!
Besides that, I'd say these gents had an impression:
Star Trek (some excellent politics in the mix which struck me at a young age, that would be Rodenberry and Matheson i think?)
Phillip K. Dick
Geoffrey of Monmouth
Biafra seems like he wouldn't fit, but those lyrics were the reason I became awake at a very young age. (Question government - criticize government but not left/right)