From Neil Baldwin’s interview on Booknotes:

“… when you start to look at the structure of Edison's work, you find out that the other root of his genius was his ability to hire the best people, people who stayed with him for decades: Charles Batchelor, John Kruesi, William Kennedy Dixon, Jonas Aylsworth, Francis Robbins Upton. These are people that I would bet that those names don't ring true with too many people watching this program right now, whereas Thomas Edison has become a household name.“