Obi-Wan Kenobi is probably one of the most popular Jedi out there. His role in the saga is paramount to its continuity. He also influences a lot of other characters lives, even after his death at the hands of Darth Vader. He is one of only a handful of Jedi that can become one with the Force upon his death, a skill that he learned from his dead master, Qui Gon Jinn.
Next: The mighty do fall.