Who exactly was Dr. Edward Richtofen based off of in real life? (Ultimis Version)

Small Information about this antagonist:

Richtofen is a Nazi Illuminati and one of the key creators of the Nazi Zombies. Forced to kill his own creations, Richtofen finds himself working with Dempsey, Nikolai, and Takeo. In the campaign, he is called General Heinrich Amsel.

I can provide full information about this man if you want