Wernher von Braun standing next to the F-1 engines on the Apollo Saturn V rocket.
One of the few people in history that I both despise and admire.
He accepted membership into the SS, lied about how long he was a member of the Nazi party, built the rockets which were used on civilian targets using slave labor to do so. He then switched allegiance after the tide turned and Germany surrendered and was pivotal in getting man to the moon.
From personal accounts of people involved in the V2 program at the time, he was so obsessed with building the rockets that he didn’t care about how it was accomplished. That sounds sociopathic and is a very dangerous trait in someone as brilliant as he was.