Túrin Turambar

In The Silmarillion by J. R. R. Tolkien, Túrin Turambar was a Man of Middle-earth, son of Húrin and Morwen "Elf-sheen", who became a tragic hero (or anti-hero) of the First Age in the tale called "Narn i Hîn Húrin" ("The Tale of the Children of Húrin"). Unpublished drafts of the story, later edited by Christopher Tolkien and published in Unfinished Tales and The History of Middle-earth series, tell the tale in more detail.

Warning: Wikipedia contains spoilers

AKA: Dagnir Glaurunga; Mormegil; Umarth, son of Agarwaen.

It's said that at the End of Time Morgoth will wage a final battle against the Valar and that Túrin Turambar will deliver the death blow to Morgoth, exterminating evil forever.