Pendell

I've seen others say this, but his role seemed more interestingly subversive - whether he himself was racist is irrelevant. He is the closest analog to the Doctor that exists in the city, and while Lindy rejects the Doctor and resists him at every turn, the moment Ricky starts saying and doing the same things, she's absolutely fawning over him and praising his intelligence and wit. They only want to hear it from those like them.

But at the end of the day a racist person is a shit person. If they've already thrown an entire race under the bus, they'll absolutely throw "one of their own" under the bus as well if the need should arise, as Lindy does. The "Mummy paid for it" type usually see themselves as the most important beings alive and any act to preserve themselves is universally good.