Sima Lun
After Empress Jia, in jealousy, deposed the crown prince Sima Yu (born not of her but of her husband's concubine Consort Xie Jiu. In 299, there was a conspiracy to overthrow her and restore the crown prince. Sima Lun was persuaded to join the conspiracy, but Lun had another plan for him: instead encourage Empress Jia to assassinate the crown prince in exile, and then use the assassination as the excuse to overthrow her. Sima Lun accepted the plan and persuaded her to assassinate the crown prince, which she did in 300. He then declared a coup against her and arrested her, slaughtering her clan and her associates (including Zhang and Pei). He then forced her to commit suicide.