Breakfast at Tiffany's, obv.
Revenge of the Nerds.
Guess Who's Coming to Dinner.
Gone with the Wind.
Airplane.
Even stuff like Amazon Women on the Moon or Kentucky Fried Movie might not make the cut today. Even though they are parodies.
Everyone says Blazing Saddles but I don't think so. For one thing, it was understood it was making fun of bigotry back then. Compare this to something like ROTN where there was actual rape involved and putting cameras in showers was seen as positive.
A lot of old Bugs Bunny cartoons wouldn't make the cut today either.