I think Buddy McGirt could have been great if he didnt have so much trouble with his shoulder, was a very good fighter who just missed out on the top echelon.

Brian Mitchell the south african fighter from the late 80's should be regarded as a great fighter but didnt really have enough big opposition match ups.

Tim Witherspoon could have been great but he wasted his prime years and got too out of shame. The same could be said of Michael Dokes.