I skipped Dolly because I honestly don't know enough about country music to know if she's a "great artist" or merely "famous over a long time". Same for the other guy: I'm just not familiar. But I called out your choice of Keanu because it's really well-known that he is not a great actor, and he probably agrees. But it's great that he made a good career for himself anyway; as I said, he does well in certain roles that fit him well. I don't consider myself the top 1% in my profession either.
Of course, I guess this could easily veer off into a discussion about what qualifies as "great artist". Does a top-selling musician/singer who has limited range or uses autotune count, or does someone with amazing technical ability but little commercial success not count? Does a "wooden" actor qualify as a "greater artist" if they've grossed higher than Daniel Day Lewis?