In the War of the Last Alliance, Isildur cut the
Isildur took up the hilt-shard of Narsil, Elendil's sword, and cut the One Ring from the hand of Sauron. Despite the urging of Elrond and Círdan, Gil-galad's lieutenants, Isildur did not throw the Ring into the fires of Mount Doom.
She's an Elf, So Has a Very Long Lifespan
The first and most obvious reason Galadriel gets to hang on to her Ring – Nenya, the Ring of Water – from beginning (i.e. its forging) to end (the destruction of the One Ring) is that she lives long enough to do so.
That Frodo is unable to destroy the Ring when he reaches the Cracks of Doom is both inevitable and devastating. After all, poor Frodo couldn't even toss the Ring into the fire at Bag End!
If Elrond seized the Ring from Isildur, Elrond would've lost all desire to destroy the Ring and kept it for himself - which given his power, knowledge and wisdom would've been an exponentially worse fate than the one that played out with the Ring in Isildur's possession.
Elrond has only Half-Elf, and he was once given the choice to be counted among Man or Elves. When he chose to be counted as Elven kind, he was then given immortality. Because Arwen is Elrond's daughter and also Half-Elf, she too has the choice to be a mortal woman or an immortal Elf.
Though someone could start out with good intentions, the Ring would eventually corrupt them. And that is why Gandalf can't touch it. He is afraid that if he did, it would corrupt him and make him just as bad as Sauron since Sauron put so much of himself and his evil into the One Ring.
Because of their intense love of the earth, the Ring does not sense hobbits as a threat, which is why they were able to be overlooked and complete the quest.
Frodo had an innocent character. The innocence made him more immune to the ill-effects of the ring. Frodo did not lust for power. Gandalf and others use power, so they can easily be deceived by it.
Sauron: The Big Boss At The End Of The Game
Do you realize that The Lord of the Rings gets its title, not from its protagonist, but from its main villain? From his dominance in the Second Age, all the way to the terror that he wielded during the trilogy, Sauron was peerless in his streak of evil.
Sauron feared her
The author said that she was the “last remaining of the Great among the High Elves” in the Third Age, and consequently was the one person Sauron must have feared most among all his enemies in the War of the Ring.
But when it becomes clear to Galadriel that Halbrand/Sauron cannot tell the difference between “saving” and “ruling” Middle-earth, she rejects his proposal.
She already feels an outcast after Gil-galad tried to send her back to the Undying Lands, and she fears that if she reveals what she has done, it will be the final nail in the coffin. Instead, when Elrond pulls her from the river Glanduin, and she races back inside to Celebrimbor's forge, she chooses to stay silent.
Since the Istari knew Sauron was only banished, not dead, but Elrond didn't kill Isildur for walking away with the ring, they knew that his spirit could be vanquished destroying the one ring.
Aragorn is not half Elf, although he is a descendant of Elros, who is half Elf (and the brother of Elrond, the half-Elf who raised him), which explains why Aragorn's life span is unusually long.
As one of the nine Nazgûl, Isildur was forced to serve the Dark Lord for all time until he was defeated and freed by Talion. The ranger later claimed his ring to survive after Celebrimbor abandoned him and eventually took Isildur's place among the Nazgûl after holding back Sauron's forces for decades.
On the one hand, this is a misrepresentation. The Ring has not tempted everyone. While Gandalf and Galadriel were offered it and tempted directly, others are not. Strider, Gimli, Merry, Pippin, Sam, and Legolas were in the presence of the Ring for months and did not succumb to its influence.
As for Sam, his resistance likely has to do with his innate goodness and loyalty. His love for Frodo helped him to overcome the pull of the Ring and his inner pureness was never fully pierced by the Ring.
Except for Tom Bombadil, nobody seemed to be immune to the corrupting effects of the One Ring, even powerful beings like Gandalf and Galadriel, who refused to wield it out of the knowledge that they would become like Sauron himself.
The first is that Bilbo is a hobbit, and as such, is particularly difficult to manipulate or corrupt. Hobbits have a natural resistance to the influence of the ring, because they are fully content in their simple lives and have no desires for power or war.
While the previous 19 rings were crafted with the help of the Elves, the final ring, the 'One Ring to rule them all,' was crafted by Sauron alone; with the ability to dominate the other rings, the One Ring was made with some of Sauron's own power, in order to make it more powerful.
Together, the two of them were known as the Blue Wizards. The one in brown was Radagast and the one in grey was Gandalf, seemingly the oldest and the least of the Order.
In the film adaptation, however, Gandalf mentions the Blue Wizards but claims he doesn't remember their names. This is actually due to a copyright issue because the names of the Blue Wizards don't appear in the trilogy. In hindsight, another good reason was that maybe adding Radagast into the story was enough.
With the Ring, Gandalf says, he would become too powerful, and he would inevitably be corrupted like Sauron himself. Even if Gandalf took the Ring simply for safekeeping, the temptation to use it would be too great. Even if he used the Ring out of a desire to do good, it would corrupt him.
While the upcoming TV series does have the chance to bring several beloved Tolkien stories to life on-screen, none of them include Gandalf. That's because The Rings of Power will be set primarily in the Second Age of Middle-earth, and Gandalf doesn't come to the land until its Third Age.