To summarize, it would be a tough choice (!) but some combination of five out of the following nominees: Pickering*, Angie, M-4, Sugarloaf, Dwarf Hawaiian*, Little Gem, Guava, Honey Kiss*, Orange Sherbet, Pina Colada, Orange Essence, Phoenix, Mahachanok, and Graham. I'd like to add Carla (but I'm not sure about tree size) and also Cecilove (if only it were being propagated)!
*=most votes.