There is at least one atheist rabbi I have heard about. Therefore it wouldn’t surprise me if there are many other leaders in Judaic, Islamic, and Hindu traditions who don’t believe in God. This terse quote from Srila Prabhupada is relevant: “Religion without God is just like Hamlet without Hamlet.” (London lecture 7 August 1971 on Srimad Bhagavatam 1.1.1)