Forum:KB:Imperial Knights Who Are Alien?

With the Fel Empire's positive inclusion of alien species, I find it very hard to believe Darth Havok would have been the only alien Imperial Knight, especially given the myriad of humanoid species. After Havok killed Fel's wife, itis likely that Fel developed a xenophobic attitude towards aliens, especially since Mingo Bovark is the only alien we see in Fel's employ during the series. My question is would it have been possible for Fel to have any other alien Imperial Knights secretly excuted or imprisoned secretly aomewhere?