Archie by late stoppage seems right. Although Archie in his older days losses to Jack but prime Archie gets him out
Very very good fight. I think Dempsey might get there with a body-attack but there's no reason Moore couldn't counter a hurt, rash Dempsey out of there and at almost any stage.
Depends on how Dempsey would decide to fight. Jack with gameplan from Firpo fight would lose very badly. I can see Dempsey wearing Moore down with his body attacks and constant agression, but he'd eat a lot of punches and I can see him being dropped. On the other hand, Moore could either outbox him to clear decision or stop him late. Very tough fight to predict.
I have Moore shaking, maybe even flooring Dempsey. Dempsey gets up and beats Moore badly, stops him in a few rounds. Although Moore was way better fighter, he can't overcome the weight in this case. Wild fight.
I don't think it's much of a stretch to say Gibbons was harder to stop than Moore. Though KO 2 is a bit of an odd prediction.
Yes and Gibbons fought firstly to survive, Moore would try to knock Dempsey out. On the other hand, Moore was much more powerful than Gibbons.