John Wayne Gacy, Jr.

Nicknamed as the Killer Clown, Gacy was an American serial killer and rapist who was convicted of the sexual assault and murder of at least 33 teenage boys and young men in a series of killings committed between 1972 and 1978 in Chicago.

Bashar Al-Assad

He is the president of Syria and is often considered the cause of the Syrian Civil War due to his various military sieges. During the fighting, he was accused of many different war crimes, as well as crimes against humanity.