Is there a Chinese warrior class? What are some notable fighters in Chinese history?

No. China has neither Samurai nor Knights or Sikhs. China is a Confucian country that worships education, not force. Taoism believes society can be ruled without using force. If you want to move to the upper class in Chinese society, the way is not by military path but by knowledge from books[1].

China is not ruled by force, not ruled by fear. Therefore, Chinese people will not fear any threat of violence.

Europe worships God as a warrior. They have to fear God. Europe worships the Goddess of Victory. Europe believes in rule by fear. Unlike Europeans, Chinese worship Confucius, Chinese worship Buddha. None of them have any military trace. The only warrior god Chinese worship is Guan Yu. You can see a shrine of Guan Yu in most Chinese restaurants. Chinese worship Guan Yu, the warrior, not for his military power but for his loyalty and trust in friends[2].

[1]學而優則仕

[2] 義氣