Heavyweight Champion and former Cruiser Champion Oleksandr Usyk, 22-0 with 14 stoppages from Ukraine.
Next up could be WBO interim champion Daniel 'Dynamite' Dubois, 22-2 with 21 stoppages from the UK. Dubois fights former champion Joseph Parker 35-3 with 23 stoppages on February 22nd.
Both light heavyweight champion Artur Beterbiev, 21-0, with 29 stoppages from Russia and Montreal, Canada, and his upcoming rematch with former champion Dmitri Bivol, 23-1, with 12 stoppages from Kyrgyzstan and India, California. Both fighters to watch.
On February 25, they have a rematch after a fight that could have ended either way.
WBC, WBO and IBF super bantamweight champion Naoya 'The Monster' Inoue, 28-0 with 25 stoppages from Japan.
He was scheduled to fight Jan. 24 against Australian Sam Goodman, who is 19-0 with eight stoppages. However, that fight has now been canceled as Goodman suffered an eye injury during training.
Inoue, a four-division world champion, is arguably the best fighter pound-for-pound.
WBC Super Flyweight Champion Jesse 'Bam' Rodriguez, 21-0 with 14 stoppages from San Antonio, Texas.
WBA Lightweight Champion Gervonta 'Tank' Davis, 30-0 with 28 stoppages from Baltimore, Maryland.
The fight with Lamont Roach, 25-1-1, has now been pushed back to August 1st in Brooklyn, New York.
WBC bantamweight champion Junto Natatani is 29-0 with 22 stoppages from Japan.
He is scheduled to face Daniel 'El General' Cuellar, 28-0, with 18 shutouts from Mexico.
WBA, WBC and WBO super middleweight champion Saul 'Canelo' Alvarez, 62-2-2 with 39 stoppages from Mexico.
WBA Super Welter and WBO Interim Champion Terence 'Bud' Crawford, 41-0 with 31 stoppages from Omaha, Nebraska.
Crawford is looking to fight Alvarez for his super middleweight title.
A possible upcoming fight between WBA and WBO Cruiser champion Gilberto 'Zurdo' Ramirez, 44-1 with 30 stoppages from Mexico, and IBF champion Jai Opetaia, 27-0 with 21 stoppages from Australia.