Vinz Clortho

Vince Clortho is one of the main henchmen of the arch-demon known as Gozer and one of the main villains of the original Ghostbusters movie, he is considered a male entity due to his role as the Keymaster, the fact he possessed a male victim and the fact he has noticably larger horns than Zuul.

Like Zuul Vince Clortho is a member of a demonic race of hellhounds known as Terror Hounds and was once worshipped as a demigod alongside Gozer prior to the arch-demon leaving our reality.

Vince Clortho possessed the body of Louis and sought out Zuul in order to presumably mate - the union of the two entities would provide enough power to reawaken Gozer and bring about the end of our world.