Maybe Golovkin? He's already a huge name and people pay to see knock outs. A win in he's match with Willie Munroe Jr would be a big win especially in the states, plenty of other big names he could face after.
We won't see another like Floyd or Manny that transcends the sport for years unless somebody beats Mayweather. I predict Klitschko beats Wilder and Joshua well into his 40s so HW is not the answer.
Golovkin would have to get a big time dance partner to break through to the PPV level fighters. Alvarez, Cotto, Froch, Ward.
This isn't even close. Canelo is already a cash cow. Only Floyd or Manny are more important than him and even at that Canelo isn't far off them. He's De la Hoya 2
Canelo looks to be the obvious, Murata has a lot of financial backing, Shiming still has insane financial backing considering his weight class
GGG if Mayweather fights him in September GGG would get an easy KO win and become an instant worldwide superstar
Wlad Klitschko is the #3 guy right now as far as money. Canelo isn't making close to what he makes. I am not sure Canelo is even making what Cotto does and he is behind Wlad also.
Golovkin is apparently willing to go down to 154 so the Alvarez fight could happen soon unless we do get too see him get a shot a floyd which i really doubt.