According to the given information, among the main characters of the Legend of the Sword and Fairy, the one with the strongest overall strength should be the only Emperor of the Yinyue Empire-Seven Nights. Qi Ye was a strategist who used his power and wisdom, and he was also an expert who had cultivated to the highest realm. His talent, strength, and wit were all outstanding. If you want to find a novel with Seven Nights as the main character, you can read " From the First in the World to Be the Mastermind." In the book, Seven Nights dominated the world's politics, business, and Jianghu. I hope you like my recommendation.😗