Grisham is a good writer, but he’s a one-note-Nelly. He writes about lawyers and legal cases, the “Litigators” being another case in point.
Using the ability to write across a spectrum of topics, I’d put before you these:
Louis L’Amore who did westerns, medieval, boxing, short stories, and the sea.
Mark Twain (of course) who did culture, river, short stories, and scifi/fantasy.
John Steinbeck who did American culture, Hispanic culture, the sea, the depression, the underdog,
The law is what Grisham knows best and that’s part of the reason why we read him. He takes a different tack each time—enough of a difference for me. The white-shoe lawyer versus the ambulance chaser was a good, up-to-date take.