Paul Giamatti is known for his roles in The Amazing Spider-Man 2, Saving Private Ryan, and The Truman Show. He has been suggested by fans for 3,716 roles on myCast, including Homer Simpson in The Simpsons. Similar actors include Jack Black, Seth Rogen, and John C. Reilly. Paul Giamatti was suggested to play Bert Kibbler. in The Big Bang Theory. by no_sanctuary. The Big Bang Theory. has 20 roles, including Sheldon Cooper., Professor Proton., and Penny Barrington..