Is there any emperor in history who saved the country when it was about to die?

After the Anshi Rebellion, the whole Tang Dynasty fell into an unprecedented predicament, and local forces raised flags to rebel, making the people miserable. At this time, foreigners also took the opportunity to start invading the Central Plains again. Tang Suzong began to use Guo Ziyi, and the United Uighurs began to buy off rebels from all over the country. Under his wise command, all the rebels were finally cleaned up within one year, and Datang, facing the situation of national subjugation, escaped.