Broly:

The one and only "Densetsu No Super Saiyajin" or "The Legendary Super Saiyajin". Broly is the son of a low level Saiyajin, Paragus, but is part of a legacy stating that every 10,000 years, an extremely powerful Saiyajin would be born, with raw strength surpassing that of any other. We only see Broly appear during the movies and never actually enters the Manga or Anime storyline. Broly's first appearance was during Dragon Ball Z - Movie#8 where he was killed the first time, however, he returns in Movie#10 after being frozen in the earth, and returns for a final time in Movie#11 by being cloned and transformed. His history shown during Movie#8 shows that Broly was probably the first Saiyajin to ever reach Super Saiyajin and Ultra Saiyajin.