Lists of things I have heard are tainted with Chaos:
The list is intended to be illustrative not comprehensive.
- Broo (everyone agrees)
- Scorpion Men (everyone agrees)
- Dragonsnails (everyone agrees)
- Crimson Bat (everyone agrees)
- Vampires (everyone agrees)
- Zombies (the Zorak Zoran cult disagrees)
- Animated Skeletons (the Zorak Zoran cult disagrees)
- Telmori (most people think tainted or cursed by Chaos)
- Cave Trolls (most people think just tainted or cursed by Chaos)
- Red Goddess cultists (nearly everyone agrees)
- Seven Mothers cultists (most educated people disagree)
- Malkioni (most educated people disagree)
- Gbaji (everyone agrees)
- Cannibals (most agree but not everyone)
- Nysalor (most Pelorians disagree)
- Trickster (Orlanthi strongly disagree)
And we KNOW Storm Bulls often have false positives (and false negatives), and besides they are kind of crazy.
As an aside, the Storm Bull cult is an Enemy of the Seven Mothers and hates it more than Orlanth does (Orlanth is only hostile)