Daisy: The reason the
Nazgul would bring
the Ring back to
Sauron is that they are totally bound to his will.
They don't even need to wear the rings to exist permanently in the wraith-world. Or to be bound to Sauron's will.
Would Saron have sent them if he even doubted?
Harad: I firmly believe Sauron has a shape in
the Third Age.
Gollum says 'He only has 4 fingers on one hand, but that is enough".
Also
Tolkien states in Appendix B 'Sauron begins to take shape'.
And on the rings being for
Men or
Dwarves, I think that they just happened to be given to them. Tolkien states that they rings gave power & gifting according to the original nature of the being possesing them (
Gandalf in 'The Shadow of the Past').
The
Elves certainly didn't make them FOR Men & Dwarves, Sauron took them & then used them to his best advantage. Only the 3 were specifically for the Elves.
Grond:
>>> Sauruman as a
Maia should be more closely attuned to
the powers of the OneRing than any of the Elves who
claimed they could use it if they wanted to (a claim never
demonstrated).
But weren't the secrets to
the Rings of Power a collaberation of the Noldorian Elves of Hollin & Sauron ?
And,
Celebrimbor, who created The Three himself, was aware of Sauron when he put on
The One, so he must have been 'tuned' to the right frequency, if you will.....
If it's a matter of 'power' there seems to be evidence to indicate that
High Elves would have that.....
How about several instances where High Elves were a match for
Balrogs (of the Order of
Maiar) in the
Fall of Gondolin?
Isn't it said
Ecthelion & Gothmog (Lord of the Balrogs & High Captain of
Angband) 'slew each other'?
And,
Glorfindel & the
Balrog who 'both fell to ruin in an abyss'?
I certainly think
Galadriel, High
Elf & princess of the
House of Finwe, would have the power or 'attunement' to use
the One Ring.