The reason I'm asking is because of Dr. Light raping Sue Dibny over at DC in Identity Crisis. I can't think of a Marvel super villain off the top of my head who has done that particular act. It seems like whenever rape occurs in a Marvel comic it's a nobody who raped a character in their origin story...it's never a card carrying super villain that does it.
Is Dr. Light unique in this regard?
Did. Or, he's not above it, anyway. Sabretooth, I THINK that it was stated (Or hinted at.)that he raped Silver Fox, one of Wolverine's old girlfriends. Crossbones had, at the very least, physically assaulted Diamondback and the Red Skull's daughter. I think that I read that he raped them, but nothing was outright stated in the story. Norman Osborn (Seemingly.) took advantage of Gwen Stacy and Harry's girlfriend Lily (Ugh!), but that wasn't outright rape. The Purple Man is really the only definite one that comes to mind, but the other ones probably did too. I can see The Owl (Depending on how crazy he's being written. He's seemed to have gotten a lot crazier over the years.) maybe doing it, but to my knowledge, he's never done it. I think that The Ultimate Universe might have a decent amount of that. But aside from The Purple Man, no!
Also, is Dr. Light being a rapist even part of the 52 cannon? Heck, does Dr. Light even EXIST anymore?