Celebrimbor

Celebrimbor (S, pron. [ˌkeleˈbrimbor]) was the son of Curufin,fifth son of Fëanor. Aside from his grandfather, Celebrimbor was the greatest craftsman in the history of Middle-earth, and his forging of the Rings of Power led to the dominion and eventual downfall of Sauron in the War of the Ring.