Exar Kun... one of the greatest Sith Lords that ever lived. He was also one of the first sith to use a double-bladed lightsaber. Notice the shoulder guard I put on him like in the comic books.
The lightsaber and head are good choices, but I'm not sure about the shoulder pad. It seems rather oversized. I'm not sure about the leg coloration either. The problem with Tales of the Jedi, is that every character has ten outfits. I'm not sure which one you're trying to reproduce.