Any of the billionaires that have already died did one thing good by nature of having died.

Give me a billion dollars and I'll donate some to the ravioli foundation.

They've all done at least one good thing that's a insanely low bar that's very subjective. Name one that isn't more good than harm in the world? They don't exist.

Mike Cannon-Brookes (co-founded Atlassian) has set up a 1.5b green fund to invest in green energy projects

Bruce Wayne.

The problem isn't a billionaire that's done anything good, the problem is a billionaire who has done more good things than bad.

Those don't exist.

There's no amount of good you can do to make up for the amount of exploitation you had to do in order to get to be a billionaire.

It doesn't mean that a billionaire can't do anything good. It just means the world would still be better off without them.

Millburn Pennybags or Uncle Pennybags gave you $200 every time you passed go.

Notch made Minecraft.

He's been a little shit since then, but at least Minecraft is pretty cool.

MacKenzie Scott

Michael Kelly caused Blockbuster to go out of business.

A better question might be “name a billionaire that does more good than harm to the world”? Although personally I think that’s an impossibility.