I haven't read any of Gore Vidal's works, but he was entertaining as an intellectual on talk shows. I posted those videos for that reason — not for his accuracy as a "historian," since he wasn't an actual historian; he wrote historical fiction.
I agree with your comments about Noam Chomsky. You fail to mention that he's extremely boring to listen to.
Where are the Gore Vidals, Norman Mailers, and other entertaining intellectuals today? As far as I can tell, there are none that rise to that level any more. Maybe intellectual discourse has changed to the point where people of differing opinions won't even talk to each other.