Yeah but unless you've read the books, his character is a bit esoteric for the movies.

IIRC I once read a letter from JRRT where he stated that Bombadil was a "deliberate enigma". He had no explanation for the character's apparent powers or origin. Considering the incredible amount of details and origin stories for just about every other character and race in the epos, that struck me as particularly whimsical. Sort of like an easter egg that ended up in a place that was slightly too prominent. An inordinate amount of time has been spent on the internet in debates whether Bombadil was an Elf, one of the Maiar, a human with some other item of power, one of the Valar or even even Eru Iluvatar incarnate.

The loss of the Barrow-wights was unfortunate, and took something away from the death of the Witch-King as well.