One of the most intelligent actors
I watched an interview with him and Dick Cavett. Mitchum was drunk on his can, but what struck me was how incredibly intellectual he was! And not in a Dick Cavett preening kind of way, just like his masculinity -- he had nothing to prove, he just WAS.
And in his younger pictures, oh what a stunner he was! He could play a malevolent, muscles-for-brains ape, but he clearly was intelligent enough to have played one of Cary Grant's roles. The difference was that Cary Grant could never have played a malevolent, muscles-for-brains ape.
They broke the mold.