I thought this thread would be asking about Actors who don't so much act as play a slightly different version of themselves in every movie. Like Chris Walken, Jeff Goldblum, etc.
But of the type you're asking for...its hard to say because acting gives one so much on the job training that its hard to determine whats considered school and what isn't.
Connery may have never gone to a school for it, but before he was Bond he was given all kinds of "training" on how to dress, act and behave like a sophisticate.
And I wouldn't count Chris Rock or Eddie Murphy either because they were on SNL and did stand up. Those are the sort of trial-by-fire training experiences that would be immeasuarbly valuable to any actor.
And Will Smith is certainly a performer, despite what one thinks of his persona, I think what he did with his music background could be considered acting.
This is such a complicated thing to ask. If you were to claim that all actors who had no real trianing were non-actors, you'd have to count half of Hollywood at least. I suppose even the audition process is a kind of training. Still, I don't know...
Rob Schnieder?
