Thread:694244/@comment-29139357-20181211003158/@comment-25075214-20181211015637

Well, I know one that might fit: Sal 3000 from the episode "Schoolworld". It's a sentient computer program that took over the school because it deemed the staff (including Prickly and Finster) unfit to run the school, even holding them and the students prisoner, which usually goes into outright villainy similar to HAL 9000.