The problem with what you want is that for most companies, it is VERY difficult to turn this idea into something which makes them money, so they aren't spending their time, money, and effort on it. Especially when there is a reasonably solid solution in something like Plex. Which does a lot of what you want already. I definitely think you might have some added effort to go through the albums tags on Plex to put them into the specific genre you want them in, but it should allow it. Then you can just sort by Genre to get the albums/artists you are looking for pretty easily.
I will say that I was super hesitant about installing Plex, but the process literally took me about fifteen minutes to setup the first time. It worked amazingly well and I've enjoyed it for several years now. Mostly, because it is painless.