Not the worst because I consider him a outstanding Cruiserweight but I can't say I've appreciated David Haye much if I'm honest.
A level above gatekeeper? I wasn't so much commenting on Ruiz's level of opposition, but his safety first jab and grab style made his fights frustrating to watch. It was similar to some of the cuddle fighters in the ufc.
Idk if he qualifies but Larry the legend Donald. If he is a legend, he's setting the bar low lol. Everybody above him who were mediocre would be great for that
Ricky Burns would have been a cracking shout if the question had been worst 3-division world titlest.
Carlos De Leon comes to mind. Feels odd to call a 4 time champ "worst" but god he was boring to watch. I think his title "fight" with Johnny Nelson should condemn them both to some sort of after life punishment.
Dennis Andries. From memory, little technique or ring craft, seemed to swing wildly at every opportunity.