Update. I've drawn my two uber-villians: the Angelic brothers Metatron and Sandalphon.
Metatron, former Minister of Angels, and Sandalphon, former Angel of the Womb and Birth, were sent to Earth by God soon after Israfel kidnapped the Muse. There mission was simple: to retrieve Serendipity the muse and subdue Israfel by any needs necessary. However, after being corrupted by the overwhelming stupidity of mankind, they formed their own agenda.
Unlike Israfel, who is a more loveable villian, these two are flat out evil. Sandalphon (the tall, dark, and handsome fellow with the hooves) has turned into a full-time pedophiliac rapist, while Metatron (on the left) has taken a liking to murder. Metatron usually just shoots Sandalphon's vessels after he is "finished" with them, and watches the victims bleed out.
They be sick, no?