Mmmh. I used to like Van Morrison*. Front row at a concert once in Hull - I could have touched the hem of the garment! But he has made the same album over and over for...nearly fifty years!
A steadily declining career from Astral Weeks? As with Orson Welles (Citizen Kane), Joseph Heller (Catch-22), Elvis Presley (Rock 'n' Roll). Does artistic genius develop with experience or just become a matter of improving technique?
After all ...even Dylan's best decades are behind him.