Suggestions for emergent layer, nitrogen fixers, and biomass species for Zone 9a

I’m in Northeastern Florida and looking for advice as the title states, both long term and short term species. Hot & humid, very rainy but with a distinct dry season, and also have chance of frost in winter. Sandy soil.

On my list already is tithonia (Mexican sunflower), pigeon pea, and corn.

I’m thinking about also trying out cardoon, sugarcane and maybe even clumping bamboo and eucalyptus.

Also, does anyone have a particular grass besides vetiver that they love working with? One that produces quickly but doesn’t take over?

Any other inspiration would be so appreciated! Thanks!!