7. Queen Seon Deok

Mi Shil has no compassion, she only has ambition for power. She use everyone and everything to become a queen. Even the coup staged by his abandoned son, Bidam, who actually in love with Seon-Deok, could be blamed on her bad influence and genetic.

Both villains are well-written. But especially Bidam, the good-turn-evil, friend-turn-enemy villain.

8. Arthdal Chronicles - I think the entire series had some of the best villains I've seen in historical dramas