What film, show or game that is not necessarily 'underated' didn't have the level of social impact it deserved.
What's the antithesis of Arrested Development, Firefly or The Big Lebowski? Those may never have 'found their audience' but over time seemed to recognised by everyone. What are the deep cuts that you liked but it feels like everyone has completely forgotten they even existed.
Only two seasons and it ended before it ever had a chance to get bad. The acting is phenomenal, sets are well designed, the background music choices are very unique for what you would expect in that time period. But it works! Cannot recommended it enough! If you can find it or “acquire” online I think it would be worth your time.