AC, I don’t think aliyos to neshamos work by virtue of the neshama hearing the Torah. I think when someone learns something l’iluy nishmas a person, the zechus of being the cause of someone’s learning is what the neshamah gets.
Unless a niftar has caused you to learn something I’m not sure he would get a zchus from it. In that respect actually I’d imagine that Hitler ym”sh might somehow get something for causing a Jew to learn Torah.