Ditch the bananas Gavin, they are about the highest carb/sugar fruit you'll find.
Bananas - 20.3g carbs per 100g
Apples - 11.6g per 100g ( though varies a bit according to type)
Oranges - 8.2g per 100g.
Edit: I ought to add that the data here are not absolutely precise, but are near enough to...