Regardless of the fact that those were not the best renditions of those men, it would still be one heck of a good resume. Especially considering that at least three of them were still holding belts at the time of those fights. How would that mystery fighter rank ? Probably high but it would also depend on what the rest of his record looked like
If FOTC hadn't happened this resume would have been better than Frazier's. However, they are 3 current champions, it is not specified for Sharkey. HW ATG #11
He’d have a place in the Hall of Fame just based off how he performed off decades-long layoffs repeatedly.
He was waiting for Marvin Hagler to be born, and then to get old. Ray Leonard, who apparently did not age, copied the second part of this plan.