God, I love the Big Lebowski, and it has so many good characters.

The Dude. Why? "Because I'm the Dude, dude!"
Jesus, also from The Big Lebowski. Why? "Nobody fucks with the Jesus."

On to some neglected but equally outstanding characters:

Agador 'Spartacus' (hank azaria) - the birdcage
Sir Hiss- the Disney animated Robin Hood.
Navin R. Johnson (Steve Martin) - The Jerk
Kermit - the Muppet Movie
'Rainbow' Randolph Smiley (robin williams) - death to smoochy

john travolta as michael. tom hanks as turner, from turner and hooch. michael j. fox as marty mcfly

Can't believe I forgot him.

Bette Davis in Now Voyager
Paul Henreid - in Casablanca