I'll give you a hint.
I just started watching the animated series, G.I. Joe: Resolute, and there is nobody more badass. This is a mute ninja who jumps out of planes without parachutes and can kill you seven different ways with just his hands. I'll come right out and say it. Snake-Eyes is a bigger badass than Darth Vader. Vader wastes so much time talking, and you always know he's there. Snake-Eyes could be behind you right now. Of course he'll probably only kill you if you're devoting your time to evil. Probably.
Episodes 2 and 8 are where the money is at, but it's worth your time to watch them all. Each one is about five minutes.
Thanks again to Penny Arcade for pointing me in the direction of cool.