Liu Jin
Liú Jĭn (simplified Chinese: 刘瑾; traditional Chinese: (劉瑾) (1451 -1510) was a well-known Chinese eunuch during the reign of the Chinese Ming Dynasty Zhengde Emperor (r. 1505-1521). Liu was famous for being one of the most corrupt officials in Chinese history and the emperor in all but name for some time. He was the leader of the "Eight Tigers", a powerful group of eunuchs who controlled the imperial court.
Read more about Liu Jin: Plotting Against The Emperor, Death, Personal Wealth