Leader of Axis Amerika was the mysterious Ubermensch, a Nazi super-soldier created by his German masters to harness the massive abilities first embodied by Hugo Danner then later by Arn "Iron" Munro. And he has more than a passing resemblance to another bald baddie in an adjacent universe.
Lex Luthor, and his counterpart Alexie Luthor, bedeviled their Supermen on Earths One and Two for decades. Although primarily relying on their unrivaled intellect, occasionally they manifested superhuman powers to match their arch-foes' thanks to various devices, such as Alexie's powerstone and Lex's powersuit.
While himself not much in the way of a genius level madman, Ubermensch was a tactical stalwart who kept his Axis Amerika in line and may well have developed further intellect to match his physique as latent exposure to the Danner treatment may have had a cumulative effect on his cranium over time. He had Lex's baldness, and Alexie's European roots. And it is logical he would've lived on Earth-X given that world's skewed sensibilities. His cosmic twin in the Infinite Crisis' Earth-10 was a like superhuman who led his world's Die Gerechitigkeitsliga, although this individual seemed to be a blend of the German Ubermensch in nationality and Arn Munro in appearance.