The ox is most compatible with the rooster, the rat, and the snake. According to Fefe Ho and Chloe Chiao of ChineseNewYear.net, the rat and the ox hold similar goals in life, and have personalities that complement each other’s strengths. The hard ox will also find the “soft” rooster easy to get along with.
Fefe Ho and Chloe Chiao argue the ox is least compatible with the goat, horse, and dog. The ox and the goat, due to their similar personalities, will always “clash”. The horse, as a free spirit, will be too much for the ox.
Ho, Fefe, and Chiao, Chlore. (2021). Chinese Zodiac: Year of the Ox. Chinese New Year. Retrieved: Jan. 15, 2021. https://chinesenewyear.net/zodiac/ox/