Head: Star Wars Mace Windu
Everything else: RoC Night Adder

Seems to me that a figure so well done in regards to detail as the Night Adder was given a sizable disservice with the Ice Viper helmet. Of course this then begs the question, what head would be just bad-assed enough, yet not too far over-the-top (as many toy companies are so apt to do)?

So, with a little paint to match up the flesh tones, I figure that Samuel L. Jackson is badass enough to fit the bill.