The real Erik Dorf.
While the character is, of course, fictitious, with many of his characteristics and parts of his biography taken from a number of historical but different Nazi figures, it may be an interesting note that Rudolf Brandt, http://www.deathcamps.org/reinhard/himmlerbrandt_de.html, was essentially the entire framework of the composite that is Erik Dorf. The major difference, obviously, is his being Himmler's protege rather than Heydrich's.