From this list, I went with "I'm Playing Easy to Get"
Not sure why "It's hard to Walk Tall When You're Small" is on this list. The song was officially released. Just about every song has an "early version" to it, and many have leaked. A lot are somewhat/significantly different. Once a song is officially released, that version trumps the others, at least insofar as the topic of this poll is concerned.
Otherwise I'd say that the early, heavier version of "Why Don't you Find Out for Yourself" should be on this list.