[Kransha]

Well, there's the Could've or Would've question. I'm sure there are a great many individuals who could do it, but not all would. Elrond, Legolas, Arwen, almost any of the elves could probably overcome the One Ring's evils and throw it in, but that was the responsibility of others. Gimli might have been able to do it, but I'm not sure.

Most humans would've fallen to the Ring's power. Even Gandalf was tempted, and might have been able to complete the Ring quest were he the bearer of that burden. In the book, Faramir had no desire for the Ring. I believe he said something like, "I would not pick this up if it lay by the roadside" (don't have my copy handy). He could do it, in my opinion. Sam could do it , considering his extreme loyalty to the side of light and Frodo. Pippin and Merry probably have the hobbit-ish resilience to do so.

Aragorn, despite righteousness, would have a harder time destroying the Ring (remember that whole Isildur thing?). Denethor, certainly not. Boromir and most other humans couldn't have accomplished it. Actually, the Rohirrim heroes, Theoden, Eowyn, Eomer, etc, are never really exposed to the Ring, so their reactions are anybody's guess.