Keith Bernstein / Warner Bros.
You want to talk credentials? No one has a better resume than Morgan Freeman, who has played, among others: God ("Bruce Almighty" and "Evan Almighty"); the president ("Deep Impact"); Nelson Mandela ("Invictus"); the CIA director ("The Sum of All Fears"); and a former CIA agent ("Red"). Plus he's got that American "speak softly but carry a big stick" persona down pat, as he showed as Eddie "Scrap-Iron" Dupris in "Million Dollar Baby": "Sometimes the best way to deliver a punch is to step back. But step back too far and you ain't fighting at all."
Above: Morgan Freeman as Nelson Mandela in "Invictus."