Feynman is my favourite physicist. Of course you could pick someone else, you could argue about the relative importance of each person's contribution to scientific knowledge, but it was his aimiability, playfulness and curiousity, combined with the fact that he _did_ break new frontiers in quantum physics that make him so inspiring for me. His famed series of lectures at Caltech were a great introduction to physics.
I was hoping to see more of his time at Los Alamos in the Oppenheimer biopic, but he doesn't even seem to be in it. There's supposedly someone playing him, but I don't see it; I assume the two-second silent shot of someone from behind playing the bongos was meant to be him.