[Maédhros]

Echtelion's death is really good. The way he sacrificed himself over Tuor being himself previously wounded in the battle.
From Book of Lost Tales II: The Fall of Gondolin

But now the men of Melko have assembled their forces, and seven dragons of fire are come with Orcs about them and Balrogs upon them down all the ways from north, east, and west, seeking the Square of the King. Then there was carnage at the barriers, and Egalmoth and Tuor went from place to place of the defence, but Ecthelion lay by the fountain; and that stand was the most stubborn-valiant that is remembered in all the songs or in any tale. Yet at long last a drake bursts the barrier to the north -- and there had once been the issue of the Alley of Roses and a fair place to see or to walk in, but now there is but a lane of blackness and it is filled with noise.
Tuor stood then in the way of that beast, but was sundered from Egalmoth, and they pressed him backward even to the centre of the square nigh the fountain. There he became weary from the strangling heat and was beaten down by a great demon, even Gothmog lord of Balrogs, son of Melko. But lo! Ecthelion, whose face was of the pallor of grey steel and whose shield-arm hung limp at his side, strode above him as he fell; and that Gnome drave at the demon, yet did not give him his death, getting rather a wound to his sword-arm that his weapon left his grasp. Then leapt Ecthelion lord of the Fountain, fairest of the Noldoli, full at Gothmog even as he raised his whip, and his helm that had a spike upon it he drave into that evil breast, and he twined his legs about his foeman's thighs; and the Balrog yelled and fell forward; but those two dropped into the basin of the king's fountain which was very deep. There found that creature his bane; and Ecthelion sank steel-laden into the depths, and so perished the lord of the Fountain after fiery battle in cool waters.