Yu Liang (庾亮) (289–340), courtesy name Yuangui (元規), formally Marquess Wenkang of Duting (都亭文康侯), was a Jin Dynasty (265-420) official and general who impressed many with his knowledge but whose inability to tolerate dissent and overly high evaluation of his own abilities led to the disastrous revolt of Su Jun, weakening Jin's military capability for years.
Read more about Yu Liang: Early Career, The Su Jun Disturbance, After Su Jun's Defeat