For starter I have attached a Nitrogen-Fixing Tree guide by Craig Elevitch written with Hawaii in mind. The publication is packed with good info and some species lists. Check out the hardiness of some of the upland species and some may be good for zone 9. However, these will probably be mostly overstory trees.
World domination requires a hollowed out volcano with good submarine access. Tiny ads are optional.
Getting ready for the Better World Book kickstarter - February 2019https://permies.com/t/99513/ready-World-Book-kickstarter-February