You can put him up against anybody at any weight as long as they held a title how high does he climb in weight. Does he get beat up by an ABC guy at Bantam? Light-weight? ect. How high does he climb.
Ricardo Lopez struggled a little mentally when he was pushed out of his comfort zone IMO so I don't think he would do particularly well tbh, up a few. But there are so many bad titleholders i bet you could get him belts all the way up to 115.
Out of his comfort zone was not winning every second aha- Do you think he could sniff even the worst of the 135lbs title holders belts?