Galahad

In the Vulgate Cycle of the Arthurian story, Galahad is the son of Elaine and Lancelot. He passed the test of the Perilous Seat and successfully drew the sword from the floating stone. By accomplishing this, be qualified as "the best knight in the world". He replaced Perceval as the Grail Seeker and is the only one of Arthur's knights who is fully successful in the quest.