I read your post and it sounded like my greenhouse! I have been branching out lately from tropical fruits to a few tropical greens - bitter leaf (vernonia amydalina), water leaf (talcum triangular), longevity spinach (gynura procumbens) and spineless chaya (cnidocolus aconitifolius).
Also, if you have room, cassabanana (sicana odorifera) is really fun.
Don't forget the solanum genus, too! It think there is a good post somewhere about the wide variety.
Cheers!
Carolyn