Which celebrities do most benevolent actions?

J.K Rowling, thanks to his collection of stories called "Harry Potter", is the first author of a woman named Forbes' billionaire list. Since he draws many hardships in his life, he tries to support the needy as much as possible. He has allocated $ 160 million of his assets for good. "It seems to me that it is our duty to spend on good things when we have more income than we need," he says.