Ooh la la, Lúthien...

[Tuor in Gondolin]

If one is looking for feminist characters in Tolkien's work, only Galadriel and Haleth can be identified as the tough female corporate executives breaking through an arbitrary glass ceiling to achieve independence and renown on their own terms.

Well, I think you'd have to include Luthien taking on Morgoth
(via Beleriand Idol song contest) in Angband, and
how about Tar-Ancalime? (Now there's a proto-feminist,
and a scary date ).