I think that if Gui Guzi takes action in "Qin Shi Mingyue", Donghuang Taiyi and Xun Laofuzi can tie with him. The ghost valley is angry and the princes are afraid; if you live in peace, the world will rest! In this sentence, he talked about the state reached by Guiguzi's strategy and strength. From Sun Bin's Pang Juan to Qin Dynasty's Zhang Suyi, and then to Qin Dynasty's Gai Niewizhuang under the bright moon, the two disciples he received, one vertical and one horizontal, were enough to change the fate of all countries.
They are called leaders in history. And Guiguzi can be said to be the originator of political strategists! Guiguzi is not mentioned in "Qin Shi Mingyue" or "Nine Songs of Heaven", but he is everywhere. His two disciples, Wei Zhuang and Gai Nie, are both first-rate masters of "Qin Shi Mingyue" and "Nine Songs of Heavenly Movement". They knew astronomy and geography, could not only wield swords, but also recite poetry to each other. Judging from the situation of his disciples, we know that Guiguzi is a very powerful teacher.
In addition, Wei Zhuang, who is so arrogant, especially respects his teacher and follows the Guigu School's ideas, which also shows Guiguzi's strength. As for their combat power, both Gai Nie and Wei Zhuang were first-class masters and swordsmen at that time. Ghost Valley has rules. There is only one descendant of Ghost Valley, and it is the destiny of the other to fulfill one of them. The last person left must be the strongest in strategy, character and strength. According to current developments, only these two can compete with each other.
Donghuang Taiyi did not appear in "Qin Shi Mingyue", but judging from the strength of his disciples, he can also be said to be a master comparable to Guiguzi. Master Xun, a Confucian, had profound inner strength. His disciples Fu Nian, Yan Lu and Zhang Liang are known as the three outstanding Confucian scholars of the contemporary era. Han Fei and Li Qi have directly influenced the contemporary era, which shows that he is also a master who can be compared with Gui Guzi. So I think that if Gui Guzi takes action in "Qin Shi Mingyue", Donghuang Taiyi and Xun Laofuzi can tie with him.