Who were the main characters of the Four Great Classics?

The Four Great Masterpieces referred to 'Dream of the Red Chamber',' Journey to the West','Water Margins' and 'Romance of the Three Kingdoms'. Among them, the protagonists of Dream of the Red Chamber were Jia Baoyu and Lin Daiyu; the protagonists of Journey to the West were Sun Wukong, Zhu Bajie and Monk Sha; the protagonists of Water Margins were Song Jiang, Wu Yong and Lin Chong; and the protagonists of Romance of the Three Kingdoms were Liu Bei, Guan Yu, Zhang Fei and Zhuge Liang.