If Frodo did not. then how would?

[MLD-Grounds-Keeper-Willie]

I think that Boromir would have. No one else would dare to, and the hobbits would go back to the shire. Gimli and Legolas would go back to the Lonely Mountain and Mirkwood. Gandalf would not touch it and Elrond would not allow it to stay in Rivendell. Aragorn might have but he probably would think that he would do what Isildur did at Mt. Doom. Bromir would take it, and pretend like he would go to destroy it but he would eventually turn towards Gondor on the path and use it to repel the orc attacks. If he would not be destroyed by the ring, he would destroy it. It would be hard and in the end he would be exhausteded but since he is a man of Gondor he would stay true to his word and destroy the ring.