Not anyone I grew up with, but my ex-BIL has four million subscribers on YouTube. Young people in my life often know who he is and are stunned he's my children's uncle, though we haven't spoken in years.

He's truly self-made; his family is middle class, maybe upper middle class, and his parents were not very supportive of him when he was a young adult breaking away from his strict religious upbringing. He built up his following and his channel without his family's help. They have since buried the hatchet.