This exercise has been useful to me, as I so easily despair over the direction the world is going to. So it helps to think that there's been so many fantastic individuals who've done something profound, and then I remember that people are worth loving; at some point, someone will be great again.
My first hero?

Rembrandt Harmenszoon van Rijn!
Vincent van Gogh (who will also be on my wall) wrote, "Rembrandt goes so deep into the mysterious that he says things for which there are no words in any language. It is with justice that they call Rembrandt—magician—that's no easy occupation."
"We should prostrate ourselves before Rembrandt and never compare anyone with him!" -Rodin, after being compared to Rembrandt.