Wow. I don't even know, but I'd guess Bombadil. xD
EDIT: here's a discussion.
Offline
Bombadil.
Offline
I really don't know. They're both pretty old but I don't know the oldest.
Offline
Hmmm...
Which one has REALLY big nose hairs?
Offline
Why couldn't they just fly to Mordor on Gandalf's eagles?
Probably because the Nazgul were in the sky too...
Offline
Bombadil.
Offline
Bombadil. If memory serves, both he and Gandalf say he is the oldest. That, and the fact that Tree Beard actually has a species that could have produced him while it seems Tom doesn't have relations.
Offline
I say Fangorn because in the Silmarillion the Valar created plants before animals.
Offline