Guys like Jerome McDougal, Yatil Green and Willis McGahee all had disabling injuries so I hate to see them listed as "busts" ****, McGahee still had a pretty decent NFL career but his explosiveness was severely hampered by the knee injury.
OP listed Buchanan. For some reason, he never became the pro bowl corner we all thought he could become. He wasn't a particularly big guy so maybe that had something to do with it. I remember thinking Baraka Atkins was going to be a great pro but I don't think he ever did much in the NFL. Nate Webster had an OK pro career after being a tackling machine here. He was a legit undersized guy though.