Chaikin is terrific on the astronauts. Kranz is staring at me from my bookshelf, but I've not yet opted to read him. Let me add 'Apollo' by Murray and Cox to your list. It's focused on the Apollo engineers and managers, including great discussions of how they re-engineered things after Apollo 1, and of the behind-the-scenes work on Apollo 13, as well as many other elements.