Phantom of the Opera characters
I think there's probably enough INFP votes for me to include him on my "Evil INFP" poster.
Sweeney is all Fi/Si Ne in the Sondheim musical. And Willow - couldn't come up with anything but INFP for her.
There be some evil INFP characters - just something we got to live with. Personally I think they're badass evil characters - there's nothing like a truly memorable and great villain/antihero in literature.