Kaibutsu Oujo, Nurarihyon no Mago Recommendations
The heroes of these series have the highest rank under their fellow demons. They can be cruel and unforgiving, but take good care for their own followers. Both series have an interesting supporting cast and deal with many mythological beiings. Nurarihyon no Mago focuses on Japanese folklore and has a school setting, whereas Princess Resurrection takes creatures from varying sources. Both are pretty accurate on how demons are presented.