While I am a bit further north then some of you, my experiences should help you all. I have two 300 gallon ponds that I put tropicals into in the summer. I will list the fish I have tried and wheather or not they were successful.
Guppies, put out 6 brought in just under 200.
Bettas, all died
Gouramis, all died
Florida flag, two pair out, about 100 in
Platies, two pair out, about 40 in, same with swords
Mollies, adults died found about 20 two inchers at end of season
Giant and longfin Danios, did very well, too many to count
Splendid Rainbows, 5 adults all died but about 150 young survived
Kribensis, pair, grew like weeds but never bred
Whiptails, bred and prospered, one pair out and about 30 in
Cories, a bunch of different types, all did very well and bred
Various Killis, all disappeared and I assume they jumped
Cherry barbs, bred and males turned the most amazing red you could imagine
Ghost shrimp, either became food or died
This has been the last two years worth. Not sure what I will be putting out this year. If you intend to save any young they need a lot of hiding places.
Plants also do pretty good as well. I grew an apon. ulvasious that was over 28" long.
I hope you find some of this helpfull.