Israel Adesanya: ESFP

Much of the reigning middleweight champion's character revolves around his aesthetic. From his showy walkouts to the cage to his fashion sense, Israel Adesanya is the consummate ESFP. In fact, his nickname 'The Last Stylebender' is a descriptor for the value he puts on entertainment.
This typically manifests in his streetwear and instinct for dancing. Prior to his recent performances in the cage, Adesanya was also known for being a creative showman as a fighter. It's arguable that, like the ESFP, Adesanya is fairly sensitive, often responding strongly to harsh criticism.
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Jiří Procházka: INFJ

The current champion of the UFC's light heavyweight division, Jiří Procházka, is an enigmatic character who gives enormous credence to the moral and ethical values of the warrior lifestyle. This is most clearly seen in his adoption of the Bushido moral code from Japanese culture.
The Czech's interest in other cultures is yet another bit of evidence of his INFJ tendencies, as the INFJ is often found in fields related to cultural studies. Furthermore, Procházka is a perfectionist like the INFJ, disparaging his own performance against Glover Teixeira despite successfully capturing UFC gold against the Brazilian veteran. Finally, the Czech phenom also exhibits a fascination with profound philosophical truths, a common interest of the INFJ.
Francis Ngannou: ISFP

The most powerful puncher in UFC history is the reigning heavyweight champion and most likely an ISFP. Francis Ngannou is a hulking but soft-spoken specimen who radiates the warmhearted, approachable personality of ISFPs.
Despite his relatively quiet demeanor, Ngannou has strong ambitions and yearns to explore his passions. Mixed martial arts is not enough, as the Cameroonian intends to box as well, actively seeking a matchup with heavyweight legend Tyson Fury. He also appears to minimize conflict, having never feuded with any of his opponents, not even Ciryl Gane, whose coach has a contentious, personal history with Ngannou.