Anyone highly regarded or prominent is eminent. Eminent people are very successful at their jobs. If you’ve heard of Neil deGrasse Tyson, it’s probably because he’s an eminent astrophysicist.
Every field has eminent — impressive, famous, or accomplished — people. Two of the most eminent coaches in the history of professional basketball are Red Auerbach and Phil Jackson because they've won the most championships. Beethoven was an eminent musician. Frank Lloyd Wright was an eminent architect. Eminent people loom over a field because they're influential and you can't avoid hearing about them. It's not easy to be eminent because you have to be extremely successful.