Steven Blum. He's good when it comes to giving a character a deep, intimidating voice.
I nicknamed him The Seth Rogan of Voice Acting, because he's seems to voice minor characters, units, in a majority of the games i have purchased for the past 7 or so years.
I also found Cam Clarke to be a good voice actor when it comes to voicing an Evil, Arrogant person (The obvious one would be as Liquid Snake, but i found his voice acting as Malygos pretty damn convincing too.)
Not just evil either, He has the "Good guy" part down too, Anybody remember Freddy Pharkas:Frontier Pharmacist?