1) Thomas Jefferson: at best, an atheist. At worst, a deist. He was a lawyer, a scientist, a historian, a philosopher, a meteorologist, an architect, a revolutionist and a ruler of a new nation. What a badass (and don't come at me for the whole "slave owner" thing -- I get it. Google the fallacy of presentism before you jump down my throat. I'm highlighting his positive attributes for this thread.)
2) Tied for 2nd, Charles Darwin, Marie Curie & Carl Sagan
3) Tied for 3rd, Hitchens and Dawkins.
4) Tied for 4th, Bill Nye and Neil deGrasse Tyson
5) tied for 5th, Quinten Tarantino, Steven Spielberg, Seth McFarlane, Trey Parker & Matt Stone
6) definitely deserving to be in my top 10... Lady Gaga
7) Ray Franz, you know why!
8) Ronald Reagan
9) tied: Ellen, for her LGBT activism/raising awareness and Dorthea Dix
10) Michael Jackson