You all wrote some great suggestions here!
Wenlesael, I thought about Gollum too, and found the same word as you. Lost. You've explained it so well, I have nothing to add.
Elanorraine, yes, Aragorn definitely gave hope to his Men, to Frodo's mission, to Middle-Earth's future. I completely agree with you.
Elbereth, I also didn't like Eowyn's at first. It is hard to describe why - she seemed pallid, almost lifeless. I saw her through her relationships with men - with her Uncle or with Aragorn. Then with Faramir. But it was a mistake, because she really has a complex personality, she is very humane in my eyes now. Even discussion on this thread proves it.
When it comes to describing Faramir I find it quite difficult. Maybe I would say he portrays the Virtue aspect for me, but in the end it wouldn't be 100% correct, since a lot characters have this strenght. I need to think about it. I definitely don't see him as bitter. He had a bitter life, yes, but he wasn't bitter in my opinion.
Brego, great post about Theoden. The fates of Denethor and Theoden are totally different, aren't they? Denethor claims to be the only legitimate ruler of Gondor, his dignity depends on it, or at least he acts that way. And it was his bane, because when suddenly he realised his power didn't safe Gondor he gone mad. And Theoden's story is completely opposite - he is the only legitimate ruler of Rohan at that time, but he didn't have his royal dignity - his mind was poisoned with words of those, who said he is powerless. And when he regains his royal dignity it helps him to feel his power and find the way to fight for his people.