I think Dick Tiger against Mickey Walker or Harry Greb are great fights to ponder...Tiger was murder on people who came forward...It makes you wonder, huh?
You can add that Tiger was more interested in the civil war in Nigeria tan the fight, too. That's not to say Foster wouldn't have got him, he probably would have, just that he fought the weakest possible version.
I think Tiger would beat Briscoe, Tiger was a beast and could out muscle Bennie and pick up a decision.