Out of all the old division goats, which one was the most overrated?

Obviously some people consider Islam and Merab to already be at division goat status, and people are torn between Stipe and Cain being the Heavyweight goat. Just consider all their achievements in their division alone, not Jose Aldo in Bantamweight or Jon Jones at Heavyweight.

And overrated means "rated or valued too highly." Doesn't mean they suck.