There have been a few interesting Canadians, including the inventor of basketball, pennicilin, the telephone, and that huge cannon Saddam Hussein bought to fire missiles across continents (it was originally designed to launch satellites).

I didn't agree with the Greatest Canadian poll. The former PM, Jean Chrétien, was way cooler on a personal level, so I'll go with him, just to be spiteful.

He fought in Vietnam.
He had a speech impediment.
He was pied in the face.
He choked a protestor who had charged his car through the car's window ("I saw 'e was a lightweight, so I took 'im out").
He used a piece of inuktitut art to beat an assassin into submission.