Matthew Sloan
From Wookieepedia, the Star Wars wiki.
Matthew Sloan is the creator of "Chad Vader", along with his friend Aaron Yonda. He provided the voice of Darth Vader in the 2006 video game Empire at War: Forces of Corruption, in the 2008 video game Soul Calibur IV, and will be providing Vader's voice in Star Wars: The Force Unleashed.
Matt was, at first, never asked to do the role, due to the fact he makes fun of Vader in his films. Only when hearing it themselves, did the LucasArts team agree he was right for the role.[source?]
