My father would often tell me that it doesn't matter how great you are or what you achieve, what matters is that when you're gone people have good things to say about you. This is the criterion for a successful life.
In that case, what a successful life Miura-sensei lived. He did achieve greatness when he made one of the greatest stories and works of art of all time. But it was a greatness untainted by controversy, by bad words and deeds. The reaction to Miura-sensei's passing is the ultimate testimony to this. And I reckon it would have been just as intense even if he had completed Berserk years ago. The man had himself left a mark as a person, separate from the work itself.
Thank you, Miura-sensei. You left the world a better place than you found it. You're a star.