Why do you want to avoid Cavendish? It has a bad reputation to some folks, but in my opinion is grossly misunderstood and at the end of the day is really quite an amazing type of banana.
As Richard stated earlier, if this a project that will be at any real scale and with the intention to sell fruits, your first task will be to see what you can source and what will sell. There is height variation among most common groups of bananas, short bananas are not unusual or rare, and are more or less the standard for any type grown commercially. Once you figure out what is marketable and what you can source, then you can narrow in on what to pick from
among the eligible remaining choices.
Growing bananas in Colorado, Hawaii and Washington since 2004.