9. Sam Rockwell - Guy Fleegman In Galaxy Quest (1999)
I know, I know. Sam Rockwells performance in Galaxy Quest is barely what you would call badass in the traditional sense but Id kick myself if I were to write a top 10 supporting characters list and not include this Guy (pardon the pun). Meant as a pure throwaway comic relief role, Rockwells obsessed fan/redshirt in an episode of the Galaxy Quest TV show (Crewman #6 in episode 81, of course) Guy Fleegman, manages instead to steal every scene he appears in and vastly overshadow the then at-the-top-of-his-game (pre Shaggy Dog/Wild Hogs) Tim Allen. Its one of the early roles that made future Rockwellians (I dont know if his fans have an official title but Id like to throw this one out there) like myself first notice his amazing talents. The character had to have been written purely for fans of the genre Galaxy Quest is spoofing. Guy is constantly drawing the audiences attention to the troupes of Sci-Fi films through his inability to separate fiction from reality, causing him to obsess over his minor character status (thus imminent death) for the whole film. These moments are when Galaxy Quest is at its best; the biggest payoff coming in the form of a Star Trek Next Generation parody in the films final minutes, in which Rockwell easily provides the best gag of the whole movie.