This is a pathetic list of guitar players to choose from. Andres Segovia isn't even on the list.
Not to mention that "best" is a relative word and not all of them play the same style of music. Therefore it's not really fair to pit them against each other.
I like all of the artists for different playing skills but I think it's unfair to say which one is the best. If you could narrow it to something a bit more specific I'd be happy to choose.
Until then, my favorite guitar player is Mark Knopfler.