It has to be: 1. Anakin/Vader...no question. Small boy to evil monster redeemed at the end by his son. 2. Luke...of course. Whiny teen to a courageous warrior to an enlightened Jedi. 3. Obi-Wan...from serious padawan, to Jedi Master of the most powerful Jedi, Anakin to wise old Jedi who ignites the spark of the Force in Luke...who saves the galaxy (with his father).