Andrew Carnegie, and it wasn’t totally altruistic. He did terrible, terrible things to get that rich. And he realized that he, and his peers, would likely be murdered French Revolution style if he didn’t do something to throw a bone to the poors. And maybe he was a little afraid of Hell. So he built concert halls (Carnegie Hall,) libraries, museums, charities, etc. I respect that he motivated (shamed) The Rothschilds, The Rockerfellers, and Vanderbuilts to emulated him out of envy. So, he achieved some good. But there’s no such thing as a Good Billionaire.