I tend to find the best stuff when I go by author/artist/mangaka rather than genre.

When something is good, other works by the same people usually come with a lot of the same attention to the same things that made something good. Barring that, I look up the stuff that those creators say inspired them, etc.

Follow the chain of creation, rather than consumption. The latter is the path you'll see most fans treading and so many consumers of art just want the same story told over and over. But talented creators will combine things and make deliberate changes to make something new, so when you find people like that, trace their paths to find the good stuff, and then trace that path, and so on.