I own a couple of contenders, but my money is on R&M, since they go the extra mile to offend. As far as politically incorrect, Family Guy says some of the worst things in a pinball machine up until Rick Sanchez made his pinball debut. I own a FG, South Park and MB, but Rick & Morty says the part you are thinking out loud... but MB says one tongue in cheek call out by Bride of Frankenstein... "I hear he has a monstrous organ..." which makes me think politically incorrect things when Dr Frankenstein says "He'll be the greatest organ player ever"... which makes me think Frank's monster might be swinging for the other team... but Drac's Bruno Magli shoe quote made me shoot soda out my nose when I first heard it at Dave and Buster's back in the 90's, but not because it was funny, but just poignantly topical due to current (unfortunate) events at the time. It's lost on most these days.