You be hitting the nail on the head IMO.... Just because McClellan suffered in the sport, does not mean you should overrate him. McClellan had a ton of potential, but blew it in the Benn fight, big time, despite being given more than one chance previously!
I fall on the Tate side of this one. Tate was a very good boxer and only lost to Nunn at 160. Tate's the kind of guy who could trouble McClellan (he won't come straight at him). Tate by decision.
Tate wouldn't last with McClellan, dude was a lethal puncher. It's not overrating McClellan to say he would beat Tate. It would be overrating him to say he could beat somebody like Roy Jones or maybe Nunn but not Frank Tate, come on.