Tua vs. Moorer comes to mind. The problem with facing Tyson is having enough to keep him off you. Moorer was a very crisp puncher, but Tyson's chin is grade A. His stoppage losses were more about fatigue than unconsciousness. Moorer did not have the chin or the foot work to stay away from Tyson long enough for Tyson to be defeated. Michael Spinks found this out the hard way. You have to be able to absorb some of Mike's onslaught, and make him respect you. Moorer's power would be enough to gain Mike's respect if he could only have been capable of taking some of what Tyson had to offer.
I do think he's got the style to score points against Mike but I would be concerned most about his durability. The '97 Moorer was able to give Holyfield some of the same problem as he did in '94, but not as consistantly and as soon as Holy drew him into a closer-quarters battle it was a different ballgame. I just think it would be tough for Moorer to remain on the outside all fight and get that jab home. At some point I see him wearing down or even getting a little macho, and that would be a problem. At this point in time, 95-96, I would definitely have to favour Tyson to get the knockout...even if he might be a point or two behind on the cards at the time.
Moorer's southpaw style may be be tricky to solve, at least for a while, but ultimately he's too chinny to be hangining in their with even a '96 Tyson who despite not being the beast he was in the late 80's, was still sharp and showed good finishing abilty (Bruno fight). Tyson: KO6
The post-prison Tyson could still bring that explosive combination of fast an powerful punches. It's a combination too much for the erratic, hard to motivate and somewhat fragile Moorer. Tyson in no more than 3.
Moorer wouldn't be able to keep Tyson off of him, bad matchup. He also doesn't have the chin needed to absorb Tysons bombs like Holyfield did. Tyson knocks him out within 3 rounds like Tua.