An 8" banana has about 121 calories and 31g+ carbs. I hate them so I don't care. A 1/2 cp of strawberries only has 45 calories and 10g+ of carbs. Blackberries 1 cp 52 calories, and 13g carbs. Also look at cherries and other berries. Blueberries (which I also hate) are good for you.
There are a lot of things you could put into a smoothie. Instead of milk try whey and chipped ice, it's low in fat, 1 to 2gs and high in protein. (Only nonfat milk has no fat, the others are about 3 to 8g of fat.) If you eat a protein one to two hours before bed it helps keeps the blood sugar from spiking. (Which may help with the hunger.) So a whey, strawberry smoothie may be just the thing.