Authors who wrote only one piece, and it becomes highly acclaimed
I just heard of a public school teacher [1] (who continues to be one) Margaret Edson who wrote only one play: Wit (1995) --- the play managed to win the 1999 Pulitzer Prize and spawned a made-for-TV adaptation that also won the 2002 Emmy Award. Since then she declined writing any new works and instead continue be a public school teacher.
That makes me interested in other such authors whose story is like hers.