Owly is quite cute. There was an issue availible for Free Comic Book day which was last weekend. You might try calling a local comic shop and see if they have any left over.
There are a *few* words but not more than one or two per page.
I would recommend practically anything by Miyazaki. We love his work.
The Books of Magic are good.
The main character might seem familiar but the comic was out BEFORE Harry Potter

The original series was written by Neil Gaiman, he has a lot of fans here.

Here is a site giving reviews for graphic novels and it includes an area for reviews with younger audiences in mind