Haven't seen TGTBTU?

Crikey, this thread is necessary then. But seeing that he's too mainstream, I am not sure what other films you'd like. MDB is definitely overrated, though I won't say the same of his performance.

As director, I think he nailed it in Unforgiven and later Mystic River.

As actor, too numerous to mention, but rather than being a competitor to Brando or Newman, he is close to Connery, working within limitations and co-creating iconic film characters.