Hi Ethan.
There is a Cold Hardy sweet edible banana that does just fine in zone 8. You can get the information about it and order the plants at this web site link
HOOKED ON PALMS. I have listied some information about it below.
HELEN'S HYBRID BANANA Chini Champa – Darjeeling Cold-tolerant, edible banana. Helen's Hybrid banana is a cross between two varieties of high altitude bananas from the foothills of the Himalayas in the Sikkim region of India. One variety, the Chini Champa, is used as food and the other is a wild type usually referred to as the Darjeeling Banana. The report is that Helen's Hybrid could possibly be the closest thing to a cold-tolerant, edible banana that has been developed. The fruit is claimed to be sweet, yet have seeds.
LeRoy