OK, I'm starting a countdown of my own, starting with number 10. It's Android 13.
Not only does he kick some ass, but he looks killer too. He's on the usual mission for Dr. Gero; kill Goku, at any cost. He does have other android buddies to help him out, but alas, they did not make it to my list of awesomeness, reserved solely for those who display great feats of awesome-nosity. He also absorbed android's 14 and 15 and turned into this beast.
He kicks some major ass in this form, but it wouldn't be DBZ without the good guys winning. OK! Stay tuned to see who is on the rest of my list! :P