The question is a troll, beyond question. I doubt any of the great names that have been named here thought of themselves as in a competition, although they were all glad to earn a buck. They sure weren't racing against each other to pick a winner; they were driven by a different muse altogether.

The question also has too many possible interpretations -- you could vote in Ochs for passion, Dylan for breadth and rawness, Baez for her clarity and soulfulness, Odetta for her spiritual depths, and Buffy Sainte Marie for sheer gusto.