From that list, Conlan was an easy vote. I would also agree with Ruben Brown and add Lil Antoine.
Truer words have seldom appeared on the Internet. But I agree, there were only a few nitwits that overrated him here, though they were pretty vocal.
For underrated, I voted for Butch Byrd. Maybe not so much back in the day, but it seems to me that Booker Edgerson has gotten more props more recently, and Byrd was much better if I recall correctly.