And yeah, Tom helps the hobbits get armed. And it also had Old Man Willow! I wanted to see a hobbit get eaten by a tree.
Tom was like the itinerant Buddhist monk of Middle Earth. .. Except he stays in one spot singing about his hot wife. ... Whatever. Either way, Tom doesn't not fit in, he's the balance to the chaos. They never really said if he was a Vala, Maia or just some super-powerful product left over from the creation of Middle Earth (at least I don't remember them ever saying what he was). The simple fact that he used song to save the hobbits suggests he may have been a Vala, since Valar were the ones whose music created Middle Earth, while the Istari never sang at all.
But no, we had to fill the whole of the LotR trilogy movies with scene after scene of Frodo looking like a gay hamster sitting inside a blender.