A certain Norwegian artist? I could name close to a hundred.
Most of those 5 artists you refer to (corrected for my definition of 'genius') are
capable of critical self-reflection and realize that their once great projects turned into jokes at some point.
What I was alluding to is how the artist in question apparently has not the faintest idea of how great his first 4 albums were, which is, indeed, a bit frightening. Even when it comes from a notorious not-so-stable mind.