4. Ralph Fiennes
Geek Credentials: Lord Voldemort in the Harry Potter franchise, Hades in Clash and Wrath of the Titans, and Gareth Mallory - aka the new M - in Bond's latest outing, Skyfall.
Who He Should Play: It goes without saying that, like Hugo Weaving, Ralph Fiennes is inextricable from his villainous performance as Voldemort; it defines his career to most audiences, and as such made Skyfall's big secret - that Mallory was not really a douchebag after all - that much easier to conceal. How easy is it to visualise Fiennes as a snarling Sith Lord, sitting on a throne and decrying the insolent rebels trying to collapse his Empire? While we have no idea yet what sort of villain Episode 7 will be dealing with, there's little doubt that Fiennes would likely fit the bill - short of the Big Bad being a woman - and given that he's just finished up Potter, he could probably do with another lucrative franchise to keep him busy.