Salinger wrote a fantastic first person narrative, I remember comparing it to The Stranger by camus, another great first person text. But the US really has some great short story writers at the end of the nineteenth century and early twentieth century that really used it brilliantly, Bierce, London (hugely underrated in my view, not just "a dog story writer") and also Lovecraft.
Like Harper Lee he shunned the media, but he did actually have reason for that. The Cauldon character had attracted a lot of conspiracy drivel, and it is not unlikely that he might have been bothered, if he had stayed a more public figuere. Then of course there is his dubious personal life, and very young women. When Lee saw the end approaching she did say goodbye in public, but he did not. There are several other famous recluses in American literary history.