Even though the Jedi were wiped out once, there are those that still follow the Light Side of the Force. They're those that use the Force for knowledge and clarity, meditation and peaceful resolution to issues. If you're wanting to play that type of character in the Star Wars RPG, Fantasy Flight Games has a sourcebook that should interest you. It's called Disciples of Harmony.
From the announcement:
Fantasy Flight Games is proud to announce Disciples of Harmony, an all-new sourcebook for Consular characters in the Star Wars™: Force and Destiny™ roleplaying game!
The rise of the Empire and the absence of the Jedi Order may have caused the Jedi Knights to fade into the ashes of history, but there are still those who know the truth, who refuse to allow the Jedi to become the stuff of legend and myth.Disciples of Harmony is a sourcebook for Consular characters in Star Wars: Force and Destiny, offering players new insights into the path of the Consular, introducing three new specializations, and making available new equipment and Force powers.
The path of the Consular is one of balance, which can lead to difficult choices in more traditional, combat-oriented campaigns. Disciples of Harmony offers Game Masters multiple avenues to incorporate their Consular characters into the adventure without disrupting their dedication to balance and the preservation of life. This supplemental sourcebook includes instructions for establishing mentors and practitioners of alternative Force traditions as well as diplomatic scenarios and adventure hooks that can flesh out a campaign setting and expand it into the wider Star Wars galaxy.