The Middle Earth Popularity Cup

[the phantom]

Because she offed the Witch King

According to the book, she just happened to be the person standing there when Merry's magic anti-Witch King sword rendered the Witch King easily killable. Anyone could have killed him in that moment.

Before Merry saved her skin, Eowyn was hurt on the ground and the Witch King was swinging his mace down for the killing blow.

while Elrond sat at home

He had already done the whole battle thing in the second age. He retired and became a healer. And with the Elves, those who specialized in healing abstained from war, for it was believed that the taking of life hindered their healing skills.

And without his healing skills- no Frodo.

And without his care and protection, no Aragorn.

Without Elrond, game over. Evil wins.