Noted or popular doesn't equal underrated or overrated at all.
Plus, there are genres that hasn't mainstream appeal at all, Prog-rock is one of them. I love Magma and will say is one of the greatest rock acts of all times and they are hardly knew, but that doesn't mean they are underrated specially for their influence on the Krautrock and the impact they had among prog fans in general.
By the criteria of "how well known" is a band or "how many fanboys it has", i can say idiotic things like "all the drone genre is underrated", which is a lie
I can see your point here. I interpreted underrated a little more loosely. Are you a fan of Animals As Leaders?
Listen son, you need a lesson in quality over quantity. Look at pagi's post count to join date, then look at yours. When pagi makes a post, everyone knows it will be big. It's kind of like a Rock appearance. In a lot of ways, pagi is the Rock of this board. You on the other hand, are more like the Funaki of this board.