Atheism doesn’t depend on an authority figure. Religious people love authority! That’s why you always get them quoting from the Quran and Hadiths because no matter what is being said, what matters to them is who said it. Even if the most silliest thing is propagated by Muhammad, then it must be true because Muhammad said it. Atheism doesn’t work like that. I couldn’t care less what Harris/Hitchens/Dawkins say. What matters is how their ideas and arguments stand on their own merits.