6. Dane DeHaan
Geek Credentials: Playing afflicted, unlikely superhero Andrew in the superb Chronicle, and playing Harry Osborn in the upcoming Amazing Spider-Man 2.
Who He Should Play: Though DeHaan is a fantastic, likable actor, there's just something about his wiry frame and menacing eyes that makes him perfect for playing a villain. If Episode VII requires an Anakin-type character who means well but eventually gets turned to the dark side, then DeHaan would be a fantastic choice for a dark apprentice. Though his short stature might not suggest that he'd have killer fight scenes, it's easy to picture the guy in the Star Wars garb, with his intense expression piercing through whoever he's looking at.