Dayanu

Ralph Ellison didn't need to write anything else after Invisible Man. He tried for sure, but for obvious reasons could never match the power of his classic nor did he have to do so.

J.D. Salinger didn't need to do anything else after Catcher in the Rye either.

And if Everclear had never done anything else and Art Alexakis had only written "Father of Mine," it would have been enough.