Jedi: Gandhi or Joan of Arc
Sith: Saddam Hussein
Despite her popularity, Joan of Arc was more Sith like than anything. She was driven by her hatred of the English as well as her belief in the divine right to rule of her King, both of these motivations are Sith rather than Jedi. Further more she frequently hallucinated, due to her self enforced starvation, which is definately unJedi in nature.
Also it should be pointed out that her name was not Joan of Arc, there is no town/village called Arc, and there never was. Her name was mistaken for Joan D'Arc, it was actually Joan Darc, and this does not translate into "of Arc".