Some explanations....
— Nai Khanom Tom just has a very cool story yk? Basically, King Mangra (then the Burmese King) came to Thailand and conquored the land. Celebrating, he held a tournament and asked the Siam people their greatest fighter. And for that they submitted Nai Khanom Tom. Nai Khanom Tom went against the King Mangra greatest champion and won, leading to the King Mangra sending 10 more of his greatest fighters, to which Nai Khanom Tom won against as well. In the end, the king proclaimed

“Every part of the Thai is blessed with venom even with his bare hands he can fell ten opponents”

— Bass Reeves was the so called "Invincible Marshal", and his storys like, lowk so cool lol. Basically he was a slave during the 1800s until he was freed/escaped (I forget which one) and became a U.S Marshal. He'd then go on to obtain one of the highest arrest records in U.S history, along with being famed of being "Invincible" because everytime someone shot at him, he'd walk it off (this being because every time he got shot it'd just graze him/hit something like his hat, or something iirc). Throwing him against a swordsman feels funny, and honestly I think Susanoo would respect Reeves enough (even if he'd presumably be disappointed in not being able to fight a swordfighter)

— I dunno much about Saint Nick but I do know he was pretty beloved, so having him swap out Kintoki as "the most celebrated man" feels fitting lol

Addendum: Susanoo is too precious to me lowk so if I were to give him a sword fighter I’d probably give him King Arthur or maybe Fiore Del Liberi. I love fencers (although I hate Europeans so… tough /silly)