Odd thing is, I did think of Gondor, but got sidetracked by the word Rammas, thinking they were a kind of stonemason people of Gondor. It was Peter Vaughan as BBC Denethor who wrong-footed me by the way he said a line: 'The walls ... that the Rammas built with so great a labour' was what it sounded like. I remember tarks popping into my head too. And Gil-Galad because of ringbearing, but I was nonplussed by boy girl large small and wondered if there was a king of Numenor called Tar-Oxymoron.
Anyway, a brilliant, challenging, enjoyable and quite inspirational Password puzzle!
P.S. If I'm honest, I was trying to make the Tharkun clue work with trolls as well.