What famous person would be the opposite of Adolf Hitler?

A few people come to mind:

Moses

Jesus Christ

Rudolf Steiner

Mahatma Gandhi

Nelson Mandela

Martin Luther King, Jr.

Henry Kissinger

Mother Teresa

Jimmy Carter

Hitler has the connotation of being the embodiment of evil. Therefore, anyone who, in your opinion, personifies goodness, selflessness, philanthropy, and is an asset to the human race would fit the bill for this situation.