You run the risk of making this a self-fulfilling prophecy. An (economically, educationally, etc.) privileged background increases the ODDS of being successful; it is not a REQUIREMENT for success by any measure. If this is getting you down, I suggest you read some stories about people from the other end of the spectrum ending up at the same place. I don't have any links, but perhaps other people here do.
Well, if you learn about successfull people through Hollywood you would have the exactly opposite bias, that all successfull people came from a tough childhood.
Executives are waaaaaaay more succussful than actors in hollywood. And you have none in your list. It might be enlightening to do a demographic study of industry executives and their lobbyists in Washington. And then report back with your findings. =D
For the person who thinks "money" is a shallow, why would "celebrity" be any "more fulfilling"? This is like comparig the health of two kinds of junk food.
Interestingly, this leads to the heart of the analysis. Which is probability of success, control of success factors, and second best outcomes, given success doesn't happen. If you consider those more "rational" metrics (agnostic of money/fame), how would they compare?
Second best outcomes (or even median outcomes) cuts to the heart of the matter. C list executives still get good money. C list actors not so much, and not even fame.
50 Cent is my #1 role model since he has achieved success despite adversity (Both of his parents were dead by the time he was 8 & he grew up in a rough neighborhood).