What person became famous just for developing their "niche" completely?

 One example of a person who became famous for developing their niche is Marie Kondo. She gained widespread recognition for her unique approach to decluttering and organizing, known as the KonMari method. Through her best-selling book, "The Life-Changing Magic of Tidying Up," and later a Netflix series, Kondo popularized the idea of keeping only items that "spark joy" and organizing one's living space with intention. Her focus on the emotional connection to possessions and the transformative impact of decluttering resonated with a global audience, turning her into a well-known figure in the world of organization and lifestyle.