Robert Ritter von Greim

Robert Ritter von Greim (Robert. Baron of Greim; 22.6.1892 - 24.5.1945) was a German Air Force general. On 26 April 1945, he and aviatrix Hanna Reitsch flew into the besieged Berlin on Adolf Hitler's orders. Greim was wounded when their plane was hit by Soviet fire. Hitler announced that since Herman Göring committed treason - by declaring that he would consider himself head-of-state when Berlin will be isolated from the rest of Germany - Greim is now the new commander of the Luftwaffe. Hitler ordered both him and Reitsch to leave the city and insure that Heinrich Himmler would be executed for his attempt to negotiate with the Allies (in the film, the news of Himmler's dealings reach Hitler as he's dining with Greim and Reitsch, and he demands to bring him Hermann Fegelein - Himmler's adjutant).

Parodies
Greim - portrayed by actor Dietrich Hollinderbäumer - is universally recognized as the dumbest charachter in the Downfall universe.