LOL. Well, I spent hours looking for the perfect theme, and just couldn't find it. :P But that's why we have a wiki, and no ranking restrictions. Go ahead and edit it, if you find a better one. I ended up listening to so much 'bad guy' music, that I'm afraid it all sounds the same. :P
Still, I'll link my (hopefully helpful) research. :P (Also, most of these are playlists, and I would suggest browing them!)
SWTOR - Deception , SWTOR: KOTFE Main Theme (<<These two come with or without chorus!>>) SWTOR: KOTET Main Theme
(Too much Star Wars? Yeah, let's do something different.)
Star Trek (Reboot) - Nice To Meld You (After all, we owe some of this madness to Talmid Show! :P )
Transformers Prime - Megatron on the Move (By Brian Tyler, the same man who did LU's Music. Cool Parallel.)
(And while this one is definitly not suited for thedude... It has to fit somewhere. :P)
Lord Of The Rings Online: Mines of Moria: - War Pipes (Band together, people of... *checks map* Britay!)