Challenge: Harry Nice but Dim

Title comes from the Harry Enfield character: Tim nice but dim (please watch some of the sketches it should give you an idea how to write Harry). In this challenge, Harry has been hit once too often by Petunia's frying pan:

Ron and Hermione are the heroes (no Ron bashing here). They must overcome all the challenges by outsmarting their opponents. They can use Harry, but he must not realise they are using him.

No one must realise that Ron and Hermione are behind Harry's successes. Exception: If you want a good Dumbledore he can be aware of their escapades (optional: he becomes their mentor).

Harry is powerful, but not intelligent. Despite this However, he will work hard and scrape through the theory side at school. He is gullible, incapable of seeing irony or sarcasm, but Ron and Hermione will protect him from most of this.

Harry is lucky, it's that pure dumb luck again.

Most of all Harry is NICE. He will not insult people; he will not respond to insults (most insults should go over his head!).

Harry must not be aware of Ron and Hermione's efforts.