Diesel?
Diesel? You have to be kidding. You need a educated, archaeologically savvy villain, not a blunt instrument. Diesel survives because his origins are ambiguous and so he appeals to all groups.
Max Von Syndow would be a good one. Thoughtful and not inherently dangerous looking. No one with a cultured English accent, please. I'm getting tired of everyone who ever studied Shakespeare in acting school being cast as an elitest devil. You can be sure, on TV anyway, if an actor speaks with any fastidiousness he will be the bad guy. Look at Lithgow in Cliffhanger. Shot that knockout lady pilot without hesitation, evil I tell you.
If he talks like Vin Diesel or Sylvester Stallone, he is a man of the people and a hero.