He's the very archetype of a random do-gooder.

My point is that the qualification "random" is rather silly when applied to one of the most wealthy people in the world. That he achieved that wealth (most of which he did not inherit) implies some skills and intelligence most likely beyond that of a randomly selected do-gooder.

An actually randomly-selected do-gooder would probably be more like a middle-class individual who walks to a soup-kitchen and offers to volunteer, or who donates money to UNICEF.