Dustin Hoffman was a major dramatic force from the 60s-80: starring in 'Rain Man', 'Marathon Man', and 'Kramer vs. Kramer'. Oh, not to mention he vicariously satisfied many the teenage fantasy in 1967 classic 'The Graduate'.
Dramas in the vein of 'A Beautiful Mind' and 'Good Will Hunting': detailing the lives of geniuses whose gift is also their curse. Will make you grateful you're just a run of the mill idiot! Make sure to check out 'Pi' for a great psychological thriller!