Kyle Rayner (First Appearance)
When the Green Lantern Corps was destroyed by the evil Parallax, the surviving Guardian of the Universe Ganthet created one final, unique power ring from the remaining power of the Guardians. Taking it to Earth to find someone worthy to use the ring, Ganthet found Kyle Rayner instead. With no alternatives, Ganthet gave the ring to the immature artist, who became the new Green Lantern.
With no training, Kyle would eventually find his way as a Green Lantern, and would be responsible for restarting the Corps by rebuilding the Central Power Battery.