Both men do comedy and serious roles; their everyman qualities make both completely relatable to audiences. Their intensity makes them believable as the good guy fighting for right and as the crooked schemer. Just look at Hanks' Philadelphia or even The Bonfire of the Vanities and Butz' Enron, Speed-the-Plow or his Tony-nominated turn in Thou Shalt Not (and again as the scheming con man in Dirty Rotten Scoundrels).
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