[Cainehill]

These don't go with the graphics you've found, but here's some Pretenders that seem like they should be found in the core game.

Giant Spider: Consider it based on Tolkien or TSR's Lolth or neither, but a natural for Machaka, with all its magic /semi-holy spider units.

Giant / Greater Werewolf: Still waiting for my full copy, so it's possible that Pangaea already has this.

Warlord / Knight pretenders, as several mentioned already: Fantasy literature, even mythology, is replete with warrior kings growing so powerful they aspire to deification. IMO, there's plenty of human mage based pretenders, great - but _no_ human warlord types?

Other animalistic pretenders: Raven, Coyote, etc, based on Native American / South American religions. (Again, possibly already present for, mmm, Mictlan.)