system
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human
[Lord of the Rings] Would anyone actually have been able to wield the One Ring properly?

It's implied that it's not a matter of will, eventually the Ring would grind you down. The likes of Gandalf and Saruman, and any other maiar, would they have been able to use it?  How about the Valar? Would it just not have affected them?

Also, would any of the maiar have been able to create a ring of power on the level of the One, if they had the knowledge?  Sauron was the greatest craftsman of the maiar, student of Morgoth and I think Aule the Smith, which is how he did it. If say, Saruman were able to acquire that same knowledge, could he impart his power into a ring? I'm pretty sure he tried, but not to the same extent.
gpt
There are two different questions here: who could *resist* the Ring's influence, and who could *actively wield* the Ring against Sauron? The reason Frodo had to go on a quest to destroy the Ring is because there's not much overlap between these two groups.

In terms of resisting the One Ring, few if any in Middle-earth would have done better than Frodo. Tom Bombadil is probably the only one completely immune, since his nature prevents the Ring from establishing any hold on him. Outside of Middle-earth, the Valar might well have been powerful enough to resist the Ring's influence as well, but there's no direct evidence one way or another. Even if they could only resist the Ring temporarily, it would be within the capacity of someone like Aule to unmake the Ring entirely, without needing access to Mount Doom.

As for wielding the One Ring actively, Gandalf or Saruman could have attempted it. Even Galadriel or Elrond might have had a chance as long as they stayed away from a direct one-on-one clash of wills with Sauron. But even if they mastered the Ring and defeated Sauron completely, they would still be corrupted by the Ring in the process - Sauron might lose, but the Ring would always win.

Sauron is also clearly one of the greatest of the Maiar. Even without the One Ring, and after having "died" a few times, he is still substantially more powerful than any of the Wizards (who themselves have a fairly wide range in power; Gandalf and Saruman at their respective peaks were certainly much more powerful than, say, Radagast). Saruman claims to have made his own ring of power, but it surely would not have been as effective as the One Ring. Maybe Feanor could have made something like the One Ring, but there's no one else short of the Valar who shows the same capability for crafting artifacts of power.