Of the people I know were deitified fom the three kingdoms era, I am only aware of 2 aside from the Emperors: • Guan Yu Taoism: Saintly Emperor Guan - Sort of like a god of righteousness. Buddhism: Sangharama Bodhisattva - Heavenly protector. Also considered the protector of temples. • Shi Xie Vietnamese Trần Dynasty: Thiên Cảm Gia Ứng Linh Vũ Đại Vương - Considered a King of proto-Vietnam alsong with the mythological Sovereigns and Emperors of China and Vietnam
Also: • Liu Bei Chengdu: Patron of Shoemakers - not a deity, rather a revered ancestor, more like a saint.
I am also curious if there are others (either worshiped as a deity or a patron).
Also while Chinese Emperor's were "divine" as they held the Mandate of Heaven, they were considered to have a close relation to the celestial beaurucracy rather than being a divine entity in their own right. Like modern popes, they were the head of the priesthood but not a living deity like the Japanese Emperor.