Inspired by the feedback to Charlie Hunnam's selection on Adam's Top 5 Up-and-Coming Actors list.
5. Jude Law, any American character
4. Julia Roberts, Charlie Wilson's War
3. Sean Connery, Hunt for the Red October (granted, he isn't exactly trying)
2. Mickey Rooney, Breakfast at Tiffany's
1. Kevin Costner, Robin Hood: Prince of Thieves (this should probably be the Kevin Costner Memorial List, really)