Greatest Man To ever Walk The Earth top 3

The first in the list is 1) prophet Muhammad : Founder and the central human figure of Islam, regarded by Muslims as a prophet of God and the last messenger. Also active as a social reformer, diplomat, merchant, philosopher, orator, legislator, military leader.
2) Isaac Newton: English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian. His law of universal gravitation and three laws of motion laid the groundwork for classical mechanics.
3) Jesus of Nazareth : The central figure of Christianity, revered by Christians as the Son of God and the incarnation of God. Also regarded as a major prophet in Islam.
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A. child is the answer