Briggs wasn't known for stopping durable opponents and his entire career only stopped one guy who was world class.
Foreman would never have fought prime Bowe ... Bowe you;d have been a very heavy lift for Foreman but , but, but if Riddick was sloppy there is a shot Foreman could have caught him like he did Cooney cause Bowe got hit too often ...
I think Foreman might have fought Bowe if Riddick had stayed champion longer. I don't see Bowe moving too much. It would be a high contact fight. I would have to go with Bowe based on his size and youth. Foreman would be a live dog going in though. If George can hit you square he's got a chance. Riddick could possibly stop George but he wouldn't come out of it unscathed.