David Tennant

The tenth doctor has continued with an impressive string of supporting roles and cameos in geeky films and TV shows of all sorts. Most notably, he played the role of the cowardly magician Peter Vincent in the exciting and overlooked Fright Night, starring Colin Farrell and Anton Yelchin. In addition to that, he's voiced the role of Huang on Star Wars: The Clone Wars, made hilarious cameos on the TV series Dragons: Riders of Berk, and even starred as the title role in a BBC production of Hamlet, for which he won a critics' choice award for best actor.