Luke is widely considered to be the most powerful Jedi. The son of Anakin Skywalker and Padme Amidala, he was raised by his aunt and uncle on Tatooine. Luke became the apprentice of Obi-Wan Kenobi, and with the help of Yoda’s training, he managed to bring his father back from the Dark Side, brought balance to the Force, and peace to the galaxy.
In the Star Wars EU, Luke went on to create the New Jedi Order, which continued the fight against rising Sith. He married and had a son, Ben Skywalker, and became a Grand Jedi Master with powers compared to a demi-god. In the newest storylines (now that Disney owns Lucasfilm, all storylines are being merged into one universe) Luke’s attempt to create the New Jedi Order failed when his nephew, Ben Solo, betrayed him.