Well considering Vader is actually only in four of the nine you can whittle it down. But it’s not in any of the trilogies that’s the best scene. The scene at the end of Rogue One where he lights up his saber from the dark and mows down all the Rebels trying to protect the Death Star data is not only the best Vader scenes it’s one of the best scenes in all of Star Wars where you really get a glimpse into the darkness that he carried with himself. I don’t read comics but have heard how ruthless he was in the expanded universe. The pure terror on the faces of those turning to hold him off and/or get through that jammed door. He uses all of his skills in that scene from light saber, choking, holding men in the air while he slices them to using the force to slam them into the wall. All with those warning sirens blasting in the background. One of the best scenes in all of SW.