Do you mean net good (more good than bad) or is a good thing like "established public libraries" acceptable even if he also oppressed workers and stifled unions and bought government officials and stuff?
Well that's why I asked OP if this is "net" calculation (good - bad) or if just the good counts.
By my evaluation I don't think any billionaire (or equivalent using PPP calculations) has ever or could ever do enough "good" to overwrite the "bad" they have to do to accumulate that much wealth, unless they literally spend it all on improving people's lives including getting down in the trenches themselves.