Cobb was a legitimate contender and clearly a level above Wepner, who would only have a chance if it was a no holds barred free for all. I think Randall would slash him open and stop him in under ten rounds.
Randall beat better fighters...I think you have to go with him winning on cuts in a tough ugly fight...
It'd be a terrible looking fight, too featherfisted fighters with little skills but hearts of lions and granite chins flailing away on each other. I'd lean towards Cobb he was more impressive on film and seemed more capable, maybe late TKO due to cuts.
Randall was a better offensive fighter both were durable but Wepner was a terrible bleeder, both men could be hit....Tex wins by TKO cuts or a UD...another thing Randell was slow but a lot faster then Wepner and Tex had more power although both were missing that snap