Scrooge McDuck - Born penniless and worked his way up to riches and wealth. Knows what matters is family(like his nephews). Also knows first hand the dangers of unchecked greed(in his case it was Gold Fever).
Billionaires don't "own" billions of dollars, so much as they "control" billions do dollars. They are much better at that; creating jobs for example, than the government will ever be. Imo