From the expanded Universe or the Films/Shows.
Mine would have to be Palpatine, or the Emperor. He brought the Jedi Order down by using politics. There wouldn't be much chance of him doing that Alone against 10,000 Jedi.
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Han Solo. The guy is a smuggler, typical badass who got the job done, received his reward $$$, and got the girl in the end. All of this without even believing in the Force, probably believed it in the end but still.
Palpatine is another level of badass though0