Luke Skywalker the chosen one’s son is said to be the strongest living Jedi as Yoda died in episode 6. He is briefly shown in episode 7 as an old man wearing a Jedi robe. The oldest living Jedi Luke was born in episode 3 by his dieing mother. Raised by his uncle and aunt he grew up on a farm on a desert planet. After training with Obi-Wan and Yoda however he challenged his father to a duel but instead of cutting him down he changes the evil Sith into a Jedi once again. His force ability has grown exponentially however and is a mystery how strong he really is at this current time.