By skyforbes For Violence I would say Saving Private Ryan(1998)
For Violence and Language I would say the Deadpool trilogy(2016-2024)
For sex I couldn’t say but I know American Pie(1999) was almost NC-17 if that counts
Scream(1996) and American Psycho(2000) were both almost NC-17 for violence
Considering the Opening Scene in Scream almost gave it an NC-17, I’m VERY surprised Saving Private Ryan didn’t get an NC-17