Well we know Elrond and Galadriel wanted the ring to flock armies to their banner and overthrow Sauron. They both knew well about the ring, and knew that the ring in the end would cause nothing but destruction, so they threw those thoughts away and did their own part to help Frodo, good job you two
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What was interesting that was brought up in a "Chapter-By-chapter" discussion was it appears that "unconscious" beings of who has the ring, are yet drawn to that person. For example the Watcher in the Water, the Orc Captain in Moria, are both drawn to Frodo, yet they are unaware that he has the ring. The Ring works to draw creatures like that, to the ring-bearer, for it's own purposes, rather manipulative that little golden ring works.
I would think if an Ent had gotten the Ring, I don't know they would have used it to bring back the Entwives? Or maybe, use it to seek out the Entwives, who knows.