There is always the few ex-military men of note affiliated with the American Axis, such as it was. In the same way certain sections of the Klan ended up training with Catholics of the Christian Front (Coughlin's group) with the Bund at Camp Nordland, Southern reactionary general George Van Horn Moseley apparently got over his prejudice of Northern immigrants enough to go from being one of the main regional commanders in the Interwar army to associating with the Bund and other such groups in the late 30's and the 40's. He was before the HUAC committee investigating the Business Plot, where he made it clear he was never involved in the scheme but took the opportunity to announce his pro-Nazi views.
Whereas the would-be Hitlers like Pelley ended up in prison during the War for sedition, Moseley wouldn't have the same anti-establishment unreliable air and would probably make a more desirable figurehead; having held a military command of no small measure and being a national figure of sorts for his infamous views.
https://en.wikipedia.org/wiki/George_Van_Horn_Moseley
http://www.personal.psu.edu/faculty/j/p/jpj1/hoods.htm (an excerpt from a university press book about the fifth column in Pennsylvania, "Hoods and Shirts", hosted on the Penn State website)