I'm not sure exactly what RVonse wants here. In our virulently capitalist society, the selling point has always been "you, too, can become rich and famous no matter how humble your beginnings if you just work hard enough."
I think the selling point is that you can become successful. Few people will become famous (for more than 15 minutes), and few people will become billionaires. "Rich" is a fungible term though.
Strip away the race and gender, and Oprah is STILL a better example of that than the likes of Trump (rich daddy), Bill Gates (wealthy parents), Elon Musk (same), and a whole host of other billionaires who were born on third base and thought they hit a home run.
Parents matter for much more than just money. How children are raised from an early age matters for their cognitive development. As does the genetic inheritance, the DNA and inheritable epigenetic modifications.
On top of all that, Oprah wasn't born with supermodel looks, and has publicly struggled with her weight for most of her life. Along the way to her perch at the lonely peak of Black Female Billionaire Mountain, she has helped a lot of others along they way, providing jobs, a leg-up in the industry, and as already mentioned, her many charitable efforts.
She made her money with a talk show that was, at best, inane blather and at worst spread misinformation. You may despise somebody like Musk for his political opinions, but he did much more for humanity than Oprah. Tesla Motors (which he did not start, I know, but he did develop it) made electric cars mainstream. Space X is a successful space launch company that will bring stranded astronauts from ISS in February after Boeing fucked up.
NASA will bring stranded astronauts back on SpaceX — not Boeing's Starliner
Both of these endeavors are far more meaningful than some insipid talk show or a song about umbrellas.
Is she entirely noble? No, but I'd point to her as a role model before I'd do the same for the likes of Sheldon Adelson, Rupert Murdoch, or the Koch Brothers.
Why? Especially the Kochs. They are well educated in chemical engineering and ran a successful energy and chemical business. I benefit far more from stable and affordable supply of energy than from any of Oprah's endeavors.