I had some other cultists that are not part of the Faces of Fear but I still like:
Wyvern - a deranged, homeless man with delusions of grandeur, a tendency to stalk beautiful women, and a poison dagger. He is called Wyvern because he wishes he was a "dragon" but falls short in almost every way.
Kraken - a mostly unremarkable fellow who operates his own one-boat dock adjacent to the actual docks; officials do not bother him because he services small, personal craft that would not bring them enough by way of taxes to cover the cost of processing them; he is a devoted if low-ranking member of the chaos cults who finds his pride in smuggling contraband into and out of the city (illegal goods, drugs, and even people) via his rickety little dock (the mouse ran up the clock). Just invented now, the man sometimes mumbles to himself in rhyme and meter for no reason but will vehemently deny it if questioned.
"Noname" - a character stolen from Hokuto No Ken, this cultist has self-preservation as his number one priority. He will not stand and fight, no matter what. If the party ever manages to back him into a corner, he will beg for his life rather than fight. This is not to say that he does not fight. He would constantly ambush the party, lead gang attacks, and pepper them with ranged weapons. But as soon as he comes into personal danger, he turns tail and flees.