Tom Bombadil.
Sings - not clotheared (or whatever is the term for someone who constantly fails a pitch).
Seemingly doesn't care about anything yet without him there would be no solution against ring wraiths (weapon). Kinda Lovecraftian creature.
Not mainstream.
Unknown by ignorant Peter Jackson's audience.
but for once I want a setting where evil wins and the good guys are powerless.
I'm just sick of fairy tale endings.I don't know Couch, that sounds like a real life, so big nuh-uh for me.
Second in line for succession to the throne, Prince Dagnarus will have his crown…and his queen -- though his heart's prize is a married elfin beauty. Let his hated half-brother Prince Helmos and the Dominion Lords dare to oppose him. For Dagnarus's most loyal servant has ventured into the terrible darkness, where lies the most potent talisman in the realm. And once it is in the dark prince's hand, no power will deter his Destiny.
Treebeard. Because I'm fascinated by the slow, somewhat alien mindset of the ents.
pibbur who has a beard, but other than that….