I think he's potentially just the Shaolin Abbot, but the one with long hair certainly seems like he would be the third CYM leader, given the white clothes.
Baihu in Shenmue 2 was part of the play on the four gate guardians, specifically within Kowloon. I don't remember exactly which were which, but the fight locations for the first three fights were named after Genbu (tortoise), Suzaku (phoenix), and Seiryuu (dragon). I think they might have also basically faced their respective fountain in the facades of the Yellow Head building.