isildur and the ring

[The Saucepan Man]

Had Frodo been able to teleport to Mt. Doom from the Shire, I believe he probably would've had little problem with destroying it.

I'm not so sure, Legolas. Didn't Tolkien say in one of his Letters that Frodo's task was an impossible one, in that no one could voluntarily have destroyed the Ring? Even without the passing of time, I believe that the power of the Ring, at its strongest there where it was created and so near to its Master, would have overcome him.

And if Frodo could not have done it, I do not believe that anyone in Middle-earth could have done. Even the most powerful, namely Gandalf and Galadriel, revealed their fear that they would succumb to the Ring were they to take it. The only conceivable exception is Tom Bombadil, but the reasons why he was not pressed into service were well-aired at the Council of Elrond.

Gandalf knew, or at least suspected, that no one could destroy it willingly. His plan was to get it to Mount Doom and trust in Eru. And he was vindicated.