You know what, I want to go against the grain for my answer. Instead of choosing a person who's voice is more badass than mine (like Morgan Freeman, James Earl Jones, Jeremy Irons, Samuel Leroy Jackson et al), I'm gonna choose someone like Phil LaMarr. He can do a shit-load of voices, both badass and silly, and he was in Pulp Fiction to boot.
Yep, I choose Phil LaMarr, the voice behind Hermes from Futurama, Ollie Williams from Family Guy, Samurai Jack from Samurai Jack, and at least 300 other voices from several movies, video games, and TV shows.