The response was a bit underwhelming.
I have a few suggestions:
Creature Feature- like Race Race, but more monstery.
Cinephilia- recreate a famous movie hero with a base class. (Edit: Dibs on Indiana Jones)
Big Dipper- creating very multiclassing-friendly classes (probably counterintuitive to the purpose of a 20 level base class contest, but oh well).
Bad Juju (is that politically correct?)- Hexes and ill luck.