Bernard Hopkins. A technical wizard , sound defense, and would do enough to win on points. ( perhaps) . I would consider it my best chance.
Some great fighters being named here .. Any thoughts of some recent fighters .. A prime GGG? or a style that gives El Escopeta problemos..
Burley. Granite jaw, supernatural control of the pacing, maybe a guy who could out-time and counter Monzon.
I'm pretty high on Golovkin right now so I'd take him. At his best he's got the footwork to close down almost any opponent, and the jab to crack open defences. He can fight both inside and out, and can box and brawl. He's as durable and arrogant as all hell - don't be fooled by the mummy's boy persona - and he'll need it against a guy like Monzon. He's got a great gas tank and a high workrate. Add to this the wide array of punches and the power, and I'd feel confident that I'd be sending in as complete a fighter as I could to take on King Carlos. If he can't work out a way to win, then there's very few that could.