Any artist that is even surviving right now is a dark horse because things change pretty fast. You're a superstar one day and wake up the next day and you're anonymous. To be successful in any way is beating the odds right now, I think.
As an artist, I identify with Sandro Botticelli. We know him as the man who painted Primavera and The Birth Of Venus. The goddesses and ancient subjects he chose represented virtues which were meant to inspire people. Then he went through a dark phase when he was listening to the sermons of Savonarola, who preached against the worldly pleasures of the Renaissance. But Botticelli's works live on, inspiring people to this day. Five hundred years after his death, he still has thousands of fans!
We are all creators. Whether or not we create is not up to us. We are human, and creating is what we do. Every interaction, movement, and decision is creativity at work. We are all artists. We all order creation around us into the world that we want to make.
In poor environment, I find great inspiration. Many of the men and women whom I admire as artists, the things they write, the songs they sing, the admission is filled with inspired moments to overcome oppression.