Bananas are a key component to many raw diets, both for their nutritional profile and their affordability. While many people do fine going on 'banana island' for a little while, bananas certainly aren't a complete diet on their own. While a varied diet is probably best, is there anything in particular the complements bananas well to give us everything we need? Another fruit or two, with a couple of greens?
I dont think restricting to a few fruits and greens is a good idea nutritional wise, its always best to get as broad a scope of different fruits, vegetables and if you eat nuts and seeds well them too.
Dont forget seaweed aswell which is basically the only iodine source on a raw vegan diet.
Its also good to get a wide variety not only for getting the wide scope of nutrients but each fruit and vegetable contains many different antioxidants, phyto-nutrients and other beneficial chemicals which as most already know are documented in preventing various cancers, heart disease, stroke and so on.