Poll
43%
7%
43%
7%
I voted Maul too. Vrook has a lot of knowledge of the Jedi, but Maul has just as much knowledge about the Sith. It's his whole life, and he is very powerful. Besides, Qui-Gon was a master swordsman, though a little old, and Obi-Wan was (basically) a Jedi Knight. Maul fought and defeated both of them with relative ease. I truly doubt even Vrook could have done this.
Vrook, while strong, can be easily defeated by a level 12 consular Exile that barely knows how to make a lightsaber. Therefore I said Maul by far.