(I am talking around the level of multi-million in the single digits rather than 100 million and up as a disclaimer)
I have come into contact with a few compassionate liberal minded people that appeared to give back to the community in more tangible ways than charity write offs or the ever popular philanthropy as a business venture (like those "helping" with education).
Because of this anecdotal evidence I would expect there to be some, unfortunately however they were few and far between, most of the ones I met were self-centered, incredible egocentric, narcissistic nasty buggers that were a bit scary in their apparent lack of concern or empathy towards others, one actually threw a hissyfit in the shop because one of our key craftsman's wife was in hospital due to a bad reaction to chemo meds and stopped working on the clients wine room project for a week to be with her. He actually threatened to withhold payment for the job and threatened a law suit if the estimated date of completion was not met. (before you ask, there was no event planned or anything that would have been jeopardized if the work was not completed by the estimated date, he was just an asshole.) This man was the norm among his peers so I doubt we will find enough to champion populist causes if that is the plan.
As far as names go, I don't really keep track of rich people and have heard of a couple that appeared to at least say a few of the right things but don't recall their names.
Interesting iea, but don't get your hopes up too high.