Chen Qun
Chen Qun made accusations against Guo Jia, one of Cao Cao's trusted advisers, on a number of occasions because he was unhappy with Guo Jia's unbridled ways. Although Cao Cao was pleased to see that Chen Qun upheld his moral principles, he did not take action against Guo Jia since Guo Jia's advice was crucial to Cao Cao's victories in battles against rival warlords.