Olorin_TLA comes closest to the mark that this thread aims for. This is not about how one comes by the Ring, or qualifications for bearing the Ring. This has all been discussed before. This is about three hobbits who bore the Ring to its final end (I'm considering that Bilbo started its journey),
and who were granted their own journey to the Undying Lands. Being a tad slow about certain things, I happened to recently notice that these three hobbits differed from all their contemporary hobbits in their affinity for Elves. This includes their having some elvish qualities, e.g., love of & extemporaneous composing & performing of poetry incorporating elven lore. It seems logical to assume there must be something about the nature of Elves when mixed w/the nature of hobbits that results in "producing" right & proper Ring Bearers. It must be something about the mix of the two races because no other beings bore the Ring on its way to Doom and then were granted passage to Aman--just Bilbo, Frodo, and Sam.
Another way to look at it would be to wonder if an Elf could have hobbit qualities, and, if there had been an Elf w/hobbit qualities, if this Elf could have been a Ring Bearer, too. If something had happened to Bilbo, Frodo, and Sam, would the Council of Elrond be looking for other hobbits who exhibited elvish traits, or their Elven counterparts?
I stretch the point to clarify the the focus of the question. Not a major question, but hopefully an amusing one.
And, did Tolkien intend to make our three hobbit heroes a bit elvish, or is that a coincidence?