Of all the undead on this list, Auron is probably the most admirable. Killed before Final Fantasy X starts, he spends the game as an unsent--a person who can’t move on to the next world--because of promises he made to protect Final Fantasy X’s two main protagonists, Tidus and Yuna.
Looking after those two eventually spirals out to involve going to defeat a giant monster named Sin, who is also Tidus’s father and one of Auron’s best friends. It’s a heavy situation for anyone, living or dead, to deal with. Auron takes it all in stride, giving advice, fighting fiercely, and being the party’s true leader without complaint. He doesn’t even tell his companions about his death until very near the end. That attitude, plus saving the world and fulfilling the lofty promises he made to two of his fallen comrades, makes Auron a shoe-in for this list.