For someone who is actually in the middle of doing this: Chris Hohn. He has built one of the largest charities in the UK, and I believe it is top 10 in the wor

For someone who is actually in the middle of doing this: Chris Hohn. He has built one of the largest charities in the UK, and I believe it is top 10 in the world. He has given away his net worth multiple times. His general story is also totally remarkable for the UK, he came from literally nowhere. Somewhat inevitably these days, he is regarded negatively in the media (most recently, he came up because the UK's finance minister used to work at his fund, so Hohn was the "vulture" capitalist with his beak in govt...funnily enough, their view didn't change when they found he is the main funding for Extinction Rebellion...2020 is amazing).