1. A.J. Hinch
Controversy aside, A.J. Hinch is the best manager in franchise history. I think this can be reemphasized with the fact that he turned the lowly Detroit Tigers around in just one season this past year.
Hinch led the Astros for five years, managing a 481-329 record, four playoff appearances, two AL Pennants, one World Series Championship, and an All-Star managerial appearance.
If you look purely at the players he developed into Stars, you know this is someone who knows his stuff. He took Carlos Correa from a promising rookie to one of the best shortstops in baseball, George Springer from an above average centerfielder to a World Series MVP, and Alex Bregman from a minor leaguer to an All-Star.
There is not much I need to say about AJ, and I hope he is honored in Houston like he should be after his career is over.