"Beanfeast" are not too bad, especially the bolognese. Pasta is easy to cook, cous cous even easier.
High energy density foods that don't need cooking are oatcakes (eaten with squirty cheese, vegetable pate or other such delicacy easily conveyed to the mouth), dried fruit and nut mix, dried kabanos (or other) sausage (the properly dried ones don't need refrigeration), peanut butter (transferred from heavy to a lightweight plastic container), smoked cheese, nut bars....