I don't believe in _______ everyone should own.
There are significant albums in each genre that listeners of that genre should have heard at least once, but I don't believe in albums everyone "should own," for the simple fact that individual tastes vary. It doesn't matter how much of a classic an album/movie/book/etc. is considered to be, there's no such thing as a 100% like ratio. It doesn't matter how much you like _______, how much you think it's the greatest thing since ever, believe it or not, there's someone somewhere who doesn't like it.
The best one could do is recommendations by taste. If you prefer _______, then these are some albums you might be interested in.