I think Blazing Saddles is an unusual case because it was written by Richard Pryor, who was funny enough to write something that contained overt racism but still be extremely funny since it was a mockery of it.

But I can think of more recent movies that are similar. It’s not that new, but still within the proper time frame I think, but Spike Lee’s Bamboozled comes to mind. I also think Get Out could have been turned into a really racist film if done by a white person.

All three of these films have a commonality which has nothing to do with the era in which they are made. The commonality is that they are movies that have highly offensive racism in them, which would be scandalous in the wrong hands, but since they are movies made by black people looking at the idea of racism, it works.