Sam is a time traveling Tom Bombadil 100% confirmed.

As far as i know, Sam and Bilbo was the only two “mortals” ever able to willing give away the ring after wearing it. And if we consider how other hobbits was both instantly subjugated (Smeagle), or slowly corrupted (Frodo), this is quite something.

Why couldn’t gandalf just get the huge bird to take frodo to drop the ring?