Its a no-brainer that Richard Feynman was one of the best physicists of the 20th century. Maybe all around, and I mean as an all around guy, he was tops. A lot of physics people are well, lacking in the social aspect but Feynman seems to have had a great personality besides being really smart and scientifically imaginative.
If you want to study physics being good at math is an important goal, but you've got to remember to focus on concepts too. I think Feynmans three volumes are one of the best resources to get you thinking physically, not just wielding equations. I've decided to dust off my copy of Volume One and re-read it. You should do that too.