Have All The Best Popes Been Atheists ?

Today 300 celibate Catholic Priests will debate their religions stance on the Family. Is this a bit ironic ? Or are really " all the best Popes Atheists " ? After all those who havent bought into a situation, or have a vested interest in one, may after all offer the most uncorrupted and useful view points on such a subject ! Maybe...after all if our heart is in something then how reliable can our judgement be ?? It is bound to be blurred.. no ?