Any decent case study/stories of entrepreneurs that started/founded success in the middle-ish years of their life?

As a mid-thirties person supporting a family, it's hard to relate or takeaway much from the stories that dominate podcasts and pop culture.

If I was a early-twenties-something, it would be inspiring to hear about the person who sold their company for millions before they turned 30 after years of a singularly focused grind and bohemian lifestyle.

But at this stage in life, I don't have the freedom to quit my day job, move my family to whatever trendy startup hub, spend every waking hour obsessively focused on the business with extreme deleterious effects on the most important aspects of my life.

Therefore, I'm interested in seeing how others in similar positions did it. Assume there are others. Maybe there aren't any and the only route of achieving entrepreneurial success is either in your single twenties or once you've become an empty-nester in your twilight years.