I'll pitch one that I really had to hunt down. When I was a kid, one of the first books I read was part of the Dick and Jane series. At first, I thought it was Scott Foresman, but that was just the publisher. Turns out it was a woman by the name of Zerna Sharp (
https://www.wikitree.com/wiki/Sharp-2843 ). Of course we would have a profile for her. Her series has been updated and re-released and I'm sure has been read by millions. She's not connected, but if we wanted to use her, I might give it a shot.
Another series that was extremely popular and also one I read a lot of was Nancy Drew. The author, Carolyn Keene, was a series of ghost writers hired by Edward Stratemeyer (
https://www.wikitree.com/wiki/Stratemeyer-2 ). He's connected, with a bio, and not only wrote Nancy Drew, but the Hardy Boys, The Bobbsey Twins, and the Rover Boys.
Last, I used to read the series called "The Three Investigators". It was a series (surprisingly enough) about 3 juvenile investigators who had an occasional relationship with Alfred Hitchcock. It was a bit of fun, they had a cool secret hideout, and some kid-stuff secret weapons. The series was written by Robert Jay Arthur, Jr. While he was born in the Philippines, he was a US citizen as his father was stationed there while in the military. Sadly, I couldn't find a profile for him, but here's his Wikipedia article.
https://en.wikipedia.org/wiki/Robert_Arthur_Jr.