Answer
Roy Waller, portrayed by Sam Rockwell in Matchstick Men, is a con artist who teams up with Nicolas Cage's character, Roy Waller, to pull off a series of scams. Despite their initial success, their partnership is tested when they become entangled in a kidnapping scheme. Rockwell's portrayal of the eccentric and unpredictable Waller adds a layer of humor and unpredictability to the film.