Basil, Pawpaw and Comfrey do well in the vicinity of Banana trees.
Also, see
Bean Companion Planting for Bananas | Home Guides | SF Gate
"Bananas require large amounts of nitrogen for healthy growth. Beans and legumes have a supply of nitrogen within nodules of their root system, which is released into the soil upon harvest. This process is called nitrogen mineralization. Successful, heavy nitrogen-giving beans and legumes include chick peas (Cicer arietinum), soy beans (Glycine max), bush beans (Phaseolus vulgaris), fava beans (Vicia faba), lima beans (Phaseolus lunatus), mungbeans (Vigna radiata) and cowpeas (Vigna unguiculata)."
and
"Coffee beans (Coffee canephora) are another companion that grows well when interplanted underneath the banana tree. Farmers in areas of East Africa utilize this strategy due to the effectiveness of bananas as a source of food security, and coffee as a cash crop, all coming from the same planting space. The leaves of the banana tree provide vital shade for the bush-like coffee plant, while the bark from the banana tree acts as a mulch and fertilizer for the coffee plant."
These can all be grown in Florida.