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.
I don’t know if this fits the category, but Warehouse 13 was pretty solid in my opinion. It’s cheesy/campy and some of the characters start off pretty much unlikeable, but when it hits its stride the relationships and character growth that are explored are deep on a human level. It has some fun quirky, hand-wavey technobabble to explain things, but the series finale left me emotional and honestly in a state of with wonder and curiosity that I hadn’t felt in a long time. Worth watching through the show at least once.