I would say that Men have more freewill than anyone else because of the Gift of Iluvatar to Men. For onceI have the book (I have not forgotten that when werewolves and RPG commitments allow, and I have a death wish, I have to explain my loathing of Luthien
)
Sil. "Of the beginning of days" "He (Iluvatar) willed that the hearts of Men should seek beyond the world and have no rest therein; but they should have a virtue to shape their life, amid the powers and chances of the world, beyond the Music of the Ainur, which is as fate to all things else;"
So Men get cadenzas the rest follow the score. No wonder the elves are passive by the end of the third age.....