in Schindler's List (film) Amon Goeth never actually rapes the maid he's infatuated with, as he's too disgusted by her Jewishness. In reality are there any/many accounts of concentration camp operators who had no such compunctions with regard to the women (or indeed men or children) in their power?

I recently answered a similar question here

To specify, there aren't many post war accounts of this by the victims because of the stigma attached to it. We do have accounts of third persons on women being subjected to sexual violence by male guards and other prisoners but it is very difficult to judge how prevalent it was due to the problems listed in the linked response.

As mentioned in the Spielberg collection, there are about 1.700 accounts of victims being also subjected to sexual violence. Another source I found just today would be the documentary "Screaming Silence" by Ronnie Sarat which aired last year in April in Israel. It's the first documentary on the subject and includes new testimony on the subject. Here is an article about it.

I hope this answers your question but if not let me know and I'll try to be more specific.