Ursula K. Le Guin was a very famous and beloved science fiction and fantasy author. One of her most revered works is A wizard at Earthsea which, set in the fictional archipelago of the title, centers around a young mage named Ged, who displays great power while still a boy and who joins the school of wizardry. Sounds familiar?
On an essay titled “Art, Information, Theft, and Confusion”, Le Guin explained that she “didn’t originate the idea of a school for wizards” (because T.H.White had already mentioned it) but that she was the first one to develop it. And that years later, Rowling “didn’t plagiarize. She didn’t copy anything” but did allow “ignorant critics” to praise “her wonderful originality in inventing the idea of a wizards’ school, and some of them even seemed to believe that she had invented fantasy”.
Le Guin’s character Ged even receives a scar from a shadow, which hurts whenever it’s near him, just as the one Harry Potter gets from Voldemort, so we can understand why Le Guin’s main problem was critics finding the premise of the first Harry Potter book original.