1) Warren Buffet
2) Mark Zuckerberg
#4 and #5 I am not too sure about. I believe Microsoft Co Founder Paul Allen and Google Co Founder Segrey Brin are Atheists as well but I could be wrong. But the first two are known Atheists. And don't forget Bill Gates, an Agnostic who is the biggest donor in the world.
Funny how we are supposed to be evil people with no morals or compassion for life since we don't believe in a higher power, yet when you look at the facts, we are doing the most for our species in the name of Secular Humanitarianism.