Inscrutable nutjobs

For a project I’m working on, I’m trying to think of filmdom’s great inscrutable nutjobs.

The idea is a character who appears to be foreign, opaque and impenetrable at first, but as the movie goes on reveals unexpected insights and tenderness.  Sort of a combination of the above folks, ie Roberto Benigni in Down By Law and Benicio del Toro in The Usual Suspects.

Your assistance in this matter is appreciated.

UPDATE: another good example: Brad Pitt in Snatch.

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