All cars must include a driver figure consisting of at least a head and shoulders.
Driver Figure part numbers (ANY suitable 1/10 driver figure is legal-these are readily available examples)
It says ANY suitable 1/10 driver figure is legal. Doesn't say they are the only ones that are legal.
A strict interpretation of the rules would mean that if you meet the bolded part above, you are good to go.
My son's Happy Meal Minion guy got dremeled in half and affixed to the roof. He still screams "Banana!" if you listen carefully.