This is a place to talk about your thoughts on the character of Luthien Tinuviel and the story of Beren and Luthien. All types of viewpoints are welcom!!!
If she wasn't the mightiest elf who ever lived, she's definitely in the running. Of course, being half-Maia didn't hurt.
To paraphrase someone on YouTube (I forget who said it), she basically completed Beren's quest for the Silmaril; Beren basically just tagged along.