To be fair, I've read a few VNs where a rapist eventually becomes a good guy, and is the protagonist (i.e. Akatsuki no Goei).

There's also a ton of rape scenes in shoujo mangas where the male love interests basically molest and then proceed to rape the protagonist, who repeatedly says no and fights back to no avail, but they eventually fall in love and become a couple, so it's all good. Maybe this is more up your alley, Mfauli, and yes, this is mainstream stuff (non-hentai), just not too popular in the west because of SJWs (Snowflake Judgmental Westerners).