It is very often overlooked, but "The Little Golden Calf" is awesome. It is an amazingly fun read yet it is full of deep insights into pre-war Soviet Union's everyday life. The character is basically a superhero who goes through this society as a hot knife through butter. Yet it is much more serious than "Twelve Chairs" which is basically a sitcom.
Wouldn't call "The Little Golden Calf" overlooked (not by Russian speakers, at least); and yes, after reading it, I wondered how it ever passed censorship back in the days.
The movie[1] is also great. Shot in black and white, it adds to the solemnity amid the humor.