Slicer recommendations for tropical climate?

I am located in the western part of Costa Rica and it is extremely hot and rainy for a large part of the year, with the other being hot and dry as a desert. I have grown tomatoes in the US, but I pretty much only grew Cherokee purple so my overall tomato knowledge isn't up to snuff. I wanted to see if anyone here knows of any heirloom originally from a tropical area or known for extreme resistance to heat and humidity.

Currently, for slicers, I've got growing blue beauty from wild boar farm, Cherokee purple (hasn't matured yet), and the Spanish variety mutxamiel. They're not outright dying in the rain here, surprisingly, and I've gotten them to yeild decent quality fruit, but the yeild is always extremely low, the plants are slow growing and sometimes deformed, and they are in a state of constant low grade stress. I know it's not really a classic slicer climate, but if anyone knows any varieties worth trying, I'd like to try them. I've got good cherry and salad varieties already, I'm just looking for a classic flavorful slicer. I'm trying to get ahold of creole, Floradade and Calypso now. If there's anything else I'm missing that anyone knows of, let me know.