Cin Drallig/Legends

Cin Drallig was a Jedi Knight in the years during and previous to the Clone Wars. He was a legendary lightsaber instructor at the Jedi Temple on Coruscant and his skills were very impressive, and, though he was not a member of the Jedi Council, his dueling abilities likely rivaled those of the Council members. His apprentice during this time was Serra Keto.

In Revenge of the Sith, his apprentice, Serra, was choked to death by Darth Vader during his purge of the Jedi Temple. Cin Drallig's dueling skills were, as good as they may have been, no match for Lord Vader's, who fended him off with one hand, (specifically his robotic hand), and slew him. He was one of the Jedi seen murdered by Obi-Wan Kenobi and Yoda over the security holograms in the temple. At the time of his murder, Cin knew Vader as Anakin Skywalker, hero of the Republic.

Behind the scenes
Cin Drallig was played in Revenge of the Sith by Nick Gillard, who was stunt co-ordinator on all three films of the prequel trilogy, and a stuntman in A New Hope. The name "Cin Drallig" comes from reversing Nick Gillard's name. In several interviews, Gillard has stated that he would destroy Anakin in a real life duel. He is seen only briefly by hologram, but is the "boss" of a level in the Revenge of the Sith video game, after you duel with Serra (who is far more difficult to defeat than simply grabbing her throat). Cin Drallig, as well is more of a challenge in the game than the movie for Vader.