Sam Riegel. Actor: The Legend of Vox Machina. Sam Riegel is a Los Angeles-based voice actor and Emmy Award-winning voice director, known for his roles in animation and video games, as well as co-founding the massively popular hit show and media brand, Critical Role and executive producer of "The Legend of Vox Machina". Critical Role has become one of the most popular storytelling and world building independent media companies in the...