I wouldn't count any of the TdV stuff, because vampire biting does not equal sex. Yes, it's sexual and definitely a metaphor for sex, but it's not sex as such. Especially since actual sex also exists in the world of TdV. I doubt Alfred thought Sarah was inviting him for some biting in Du bist wirklich sehr nett. So uninvited vampire biting does not constitute rape in my view of the show.