Among the Four Great Grandmasters, Ku He, Sigu Jian, and Ye Liuyun had died.

The four Grandmasters were Jin Yong, Gu Long, Liang Yusheng, and Wen Rui An.
The four Grandmasters were the Qing Emperor, Ku He, Ye Liuyun, and Sigu Jian.
The four great masters in Joy of Life were played by Zhang Ruoyun, Wang Qingxiang, Chen Daoming, and Tong Mengshi.
The Four Great Grandmasters in Joy of Life were Northern Qi's Imperial Advisor Ku He, Dongyi's Sigu Jian, the Qing Kingdom's Ye Liuyun, and the Qing Emperor. However, the search results did not clearly mention how many of the four grandmasters had died. Therefore, based on the information provided, it was impossible to determine how many of the four Grandmasters in Joy of Life had died.
In Sword Snow Stride, there was a ranking of the four grandmasters. Among them, Wang Xianzhi was the undisputed number one in the world, and he was the undisputed Celestial Being Realm on land. Next was Xu Fengnian, the heir of the Prince of Beiliang. He had obtained the Great Yellow Court at Wudang Mountain and the fate of the Demon-slaying Stage at Longhu Mountain. In the battle with Wang Xianzhi in Wudi City, he had comprehended the Celestial Being Realm. The third was Bodhisattva Tuoba. He was the God of War of the Northern Mang. In the army of the Northern Mang, he alone could resist 300,000 cavalrymen of the Northern Liang. Finally, there was Cao Changqing. He was a scholar from the Western Chu Kingdom. His cultivation level was Celestial Phenomenon. During the battle at the Western Fortress Wall, he had fought Xu Fengnian's mother, Wu Su, to a draw.
The four Grandmasters were Situ Xuankong, Monk Chou, Jin Tai, and Zhang Sanfeng.
The rankings of the four Grandmasters were as follows: First was the Qing Emperor, second was Sigu Jian, third was Wu Zhu, and fourth was Ku He.
The four great grandmasters in the << Sword Snow Stride >> were Sword God Li Chungang, Spear Immortal Wang Xiu, Fengdu Green Robe, and Talisman General Red Armor Ye Hongting. Among them, Li Chungang was regarded as the strongest of the four grandmasters. His achievements in the way of the sword were unmatched. Wang Xiu was famous for his cold spear technique and decisive fighting style. Fengdu Green Robe was a mysterious expert, while Ye Hongting was a talisman general in red armor. These four grandmasters played important roles in the novel, displaying their unique martial arts and personalities.
The four Grandmasters of Joy of Life were the Qing Emperor, Ku He, Ye Liuyun, and Sigu Jian. The Qing Emperor was the least powerful but the most decisive grandmaster. He had more of a domineering aura. Ku He was the Imperial Advisor of Northern Qi. He had become the world's first Great Grandmaster through a mysterious secret manual. Ye Liuyun was from Qing Kingdom and had become a Great Grandmaster by practicing Flowing Cloud Free Hand. Sigu Jian was the City Lord of Dongyi. He had become one of the strongest Grandmasters by learning the Sigu Sword Art. These four Grandmasters were all extraordinary experts. Their endings were different. Ku He and Sigu Jian had been seriously injured by the Qing Emperor in the battle at Dong Mountain and eventually passed away. Ye Liuyun had succeeded and left the Qing Kingdom. The Qing Emperor had hidden his strength and eventually revealed his identity.
The ranking of the four grandmasters was as follows: First was the Qing Emperor. He was the grandmaster who hid the deepest and was very powerful. Second place was Sigu Jian. He had outstanding swordsmanship and killing intent, and was known as the Sword Saint. The third place was Ye Liuyun. He was once proficient in swordsmanship, but later changed to fist techniques and created the Flowing Cloud Free Hand. The fourth was Ku He. He yearned for the path of the Celestial Being and became a great grandmaster.