who is the greatest Legilimen and Occlumen in harry potter series

Albus Dumbledore was widely regarded as the greatest Legilimens (mind reader) and Occlumens (mind shielder) of his time, surpassing even Voldemort in this skill. While Snape was also highly skilled in both arts, Dumbledore's mastery was unparalleled. This ability allowed Dumbledore to penetrate minds and protect his own thoughts effectively.