Privately, I think it's Xiang Yu, the overlord of the place of Chu. Although Xiang Yu never proclaimed himself emperor, he overthrew the cruel rule of the Qin Dynasty, dealt a heavy blow to the feudal landlord class, ordered governors, enfeoffed kings, and became the de facto emperor. He fought all his life in the south and fought in the north. He was a hero, and his martial arts were superb. If Xiang Yu had not overthrown the Qin Dynasty, there would have been no great prosperity of the Han Dynasty established by Liu Bang. He cleared the way for the establishment of the Han Dynasty, and Sima Qian wrote the Biography of Xiang Yu for him. So Xiang Yu has the highest achievement!
Satisfied, please adopt.