LOTR: What Would Happen If The One Ring Fell Into Treebeard's Hands?

gamerant.com:

There are so many examples across the Lord of the Rings and The Hobbit in which Sauron’s one Ring of Power brings out the worst in all who come into contact with it. It makes Thorin fall to dragon-sickness more quickly, as it manipulates and twists emotions. It makes the members of the council of Elrond fight among themselves and brings up past conflicts. It turns Boromir against the fellowship and ends up getting him killed. Even Frodo, the protagonist and the hero of the story, eventually succumbs to the cunning ring's trickery. Its sole purpose, its very design, is there twist people, to control and manipulate them into making the most terrible choices with the most disastrous consequences. And then, once it has had its evil way with its current bearer, it will betray them, in search of a new person to command towards evil.

Having said that, there are definitely some beings and creatures of Middle Earth who are more easily able to resist the allure of the One Ring than others. It is said time and time again that hobbits are actually one of the best-placed peoples to encounter the ring, despite how unlikely that seems. They are not hungry for power, but are content with peace, good food, and good company. The fact that most hobbits have no interest in politics or great kingdoms works in their favor. But if an interest in looking after and preserving the natural world and a love of things that grow is a qualifying factor in being able to resist the One Ring's power, what would happen if the Ring had fallen into the hands of an Ent?

Tolkien's Most Obscure Story Is Actually His Best One

Ents, on the whole, are another type of creature within Middle Earth who are reluctant to involve themselves in the affairs of the world.