Hello,
You can grow there all of citrus except pomelo and lime, can grow avocado, cherimoya, strawberry guava, suriname cherry, cherry of the rio grande, natal plum, chilean guava, texas persimmon, kei apple etc. If you plant additional heating and you can provide 30-35 F or more,you can try guava, pitangatuba, coffee, sweetsop, lucuma, barbados cherry, pomelo,lime, orangeberry,red and sabara jaboticaba etc.
Avocado worth to grow if you can provide higher temperature than 25-30 F in blooming season. Surprisingly cold hardy,but depends on origin. Mexican type avocado is the most cold hardy.
And yes,the coffee plant and the guava are cold hardy-both easily survive 30 F cold-only a short period of time.
You will plant out the plants or will grow in pots?