Mandrill is another who "rapes" through mind control.
Sabretooth supposedly raped Silver Fox.
In modern retellings, Belasco wasn't just hocus-pocusing over young Illyana, but raping her. And he certainly raped the original Beatrice.
D'Ken raped Cyke's mom.
Lincoln Slade, the Phantom Rider, raped Mockingbird, but he used drugs and hypnosis to make her more pliable.
Kaptain Brtion and Sat-Yr-9 liked to rape, in tandem with mind control, but I'm sure that was optional. Psylocke killed the former when he tried with her.
I'm quite sure it's been suggested that Sugar Man raped a lot. Can't recall the examples off hand though.
Coach, from X-Force/Statix, attempted to rape U-Go Girl. She shot him for that.
Joe MacTaggart raped Moira, and this was the explanation for Proteus' madness. Don't accept that last part, but well...
When was it implied (Or stated.) that he did that to Magik? Is he really that low? I don't think that anything like that has been said about The Sugar Man (Although he is really freaky, so, who knows?). I didn't know about D'Ken. Isn't he dead? Crossbones might have raped, as well.