Yeah, Bobert, "Führer" prolly wouldn't go over well with many people, but I'm not sure its connotations are way worse than "czar."   I mean, if we're going for rhymes or alliteration, not to mention elevating our bureaucrats to kingly status, why stop with "Car Czar?
Why not add some of these?

Finance Führer
Truk Muki Muk (I tried to post Big Drug Muki Muk above but I misspelled Drug.)
Energy Emperor
Kindergarten Khan
Bomb Bastard
Health Honcho
Gun Shogun
Interior Inquisitor
Transportation
Highway
Rail Rajah
Il Duce Of Defense (or Defense Dictator)
Airline Autocrat
Education Earl
Poverty Poobah