I recently watched Look Who's Back. It's hilarious and well made overall. It's also very refreshing in the age of pc to have a comedy based on literal Hitler spouting things that'd get you banned from most online forums before you had the time to type "it's just a joke guys". (And it most cases, despite it.)
Besides being inherently funny with the situational comedy of inserting Hitler into pretty much any modern situation, its social commentary is also pretty on-point without being annoyingly moralising.
8/10, pleasantly surprised they managed to pull it off, especially in Germany. This might also be the first German comedy I actually found funny, but then I didn't watch many.
@trinsec yeah that sounds pretty boring, as much as I love books a movie is a much better medium to present this kind of comedy.