I believe his character is Tommy DeVito, but I'm probably wrong.

Well, as I read through each of the lists I found myself nodding my head on all of them. I would be doing a disservice if I chose to single out people's posts or parts because I didn't disagree with anyone's post. There are only a couple I wish to add. If these were on people's lists I missed them, sorry.

Peter Sellers as Jaques Clouseau in all his films, A Shot in the Dark especially.
Gene Wilder as Willy Wonka
Mel Gibson as William Wallace
Claude Rains as Renault in Casablanca
Charlton Heston as Judah Ben-Hur
Robert Duvall as Lt. Col. Kilgore in Apocalypse Now