That's why I have such a hard time with Tolkien's choice of Turin to be Morgoth's "executioner" at the End of Arda. If you haven't read
The Lost Road and Other Writings, here is what the Professor envisioned, but never completed for publication:
Thus spake Mandos in prophecy, when the Gods sat in judgement in Valinor, and the rumour of his words was whispered among all the Elves of the West. When the world is old and the Powers grow weary, then Morgoth, seeing that the guard sleepeth, shall come back through the Door of Night out of the Timeless Void; and he shall destroy the Sun and Moon. But Earendel shall descend upon him as a white and searing flame and drive him from the airs. Then shall the Last Battle be gathered on the fields of Valinor. In that day Tulkas shall strive with Morgoth, and on his right hand shall be Fionwe, and on his left Turin Turambar, son of Hurin, coming from the halls of Mandos; and the black sword of Turin shall deal unto Morgoth his death and final end; and so shall the children of Hurin and all Men be avenged.
Thereafter shall Earth be broken and re-made, and the Silmarils shall be recovered out of Air and Earth and Sea; for Earendel shall descend and surrender that flame which he hath had in keeping. Then Feanor shall take the Three Jewels and bear them to Yavanna Palurien; and she will break them and with their fire rekindle the Two Trees, and a great light shall come forth. And the Mountains of Valinor shall be levelled, so that the Light shall go out over all the world. In that light the Gods will grow young again, and the Elves awake and all their dead arise, and the purpose of Iluvatar be fulfilled concerning them. But of Men in that day the prophecy of Mandos doth not speak, and no Man it names, save Turin only, and to him a place is given among the sons of the Valar.
Morgoth did specifically curse the House of Hurin and actively work for its undoing, but as Iolanthe mentioned above, so many of Turin's woes were actually caused by his own pride and willfullness and bad judgment. I have such a hard time seeing how Turin can be worthy of being given a place "among the sons of the Valar."
For me, the more logical candidate for Turin's role in the Last Battle is Elrond. As Half-Elven, he would symbolically avenge the evils of Morgoth against both Elves and Men. And I feel that of all of Tolkien's characters, Elrond is by far the most aggrieved. During the course of his life, he suffered the loss of virtually every family member and foster-father he ever knew due to evil initiated by Morgoth's theft of the Silmarils and the evil of his chief lieutenant Sauron -- Earendil, Elwing, Elros, Maglor, Gil-Galad, Celebrian, Arwen, and potentially Elladan and Elrohir as well, since Tolkien does not tell us about their final decision. And unlike Turin, Elrond led an extraordinarily exemplary life, making wise and difficult decisions, and sacrificing his personal happiness for the good of all.
Then again, the role of "executioner of Morgoth" does seem ill-suited to the temperament of Elrond, the chief healer of Middle-earth, and a better fit for the rash and bloody-minded Turin. I just wish that afterwards, Turin would be sent beyond the circles of the world with the rest of his kin, rather than be granted a place among the sons of the Valar. Just doesn't seem appropriate to me. Turin, of all people, and not Aragorn?
Your thoughts?