In the movies: Gandalf. In the books, although I'm only a couple dozen pages into The Two Towers right now: Gandalf. Although, Frodo lived with the Morgul-Blade wound for like 17 days before it was properly treated. And at that, Aragorn did lead the Hobbits for hundreds of miles safely until the breaking of the fellowship. Could you imagine that? Hiking for hundreds of miles through flat land, hilly land, mountains, forests? It might be kind of fun, actually, if there weren't ghostly wraiths chasing after you and angry trees and goblins and orcs and such.