It really does need to come from the boxers. They're going to need some type of union at this point. There's the WBC, WBO, WBA, IBF, and now the IBO is trying to become a thing. Not to mention you have regular, interim, and franchise "champs" in addition to "lineal titles". By the time everything is added up there will be 20 champs per weight class...how can 20 people be the "BEST"???
When PBC first started there were whispers of them making a PBC belt system which was going to be used to essentially replace all other belts. I fully supported that because the current system has been a complete failure. But we later learn that PBC has embraced the belt orgs and assimilated like every other promoter.
The fighters themselves will need to boycott belt orgs the same way Floyd and Canelo have in the past. Only way its going to work tbh