Well, I tried to make the "The most obnoxious famous person YOU'VE met" but it was too long.

I haven't met too many famous people, at least ones you'd be likely to recognize.

But the most obnoxious one I ever met was R. Buckminster Fuller. I had dinner with him. He could not make dinner conversation, and could only be described as "full of himself" and simply rude.

Who's yours?