Image Credit: Lucasfilm
#15. Count Dooku
Count Dooku was a Sith Lord during the Clone Wars. He was a former Jedi Master, and left the Jedi Order. Dooku’s departure was caused by disillusioned government corruption, and some say, caused by the death of his former apprentice, Qui-Gon Jinn.
After leaving the Jedi Order, Dooku became an apprentice to Darth Sidious. Thus, taking on the name Darth Tyranus. Along with General Grievous, Count Dooku was the driving force behind the Separate Alliance, turning world after world against the Republic. Dooku also had a hand in the creation of the clone troopers.
Among with many other many skills, and Force abilities, Dooku was a superb lightsaber duelist. When he was with the Jedi Order, Dooku was one of the finest lightsaber duelists. He was also a master at telekinesis and Force grip. Since he was so strong in the Force, Dooku also mastered the art of Force lightning, and he was able to use it two different ways: as a means of torture, and execution.