Not really a rank, but Colonel Hans-Ulrich Rudel, a German WW2 ace, received the highest military order in the of Third Reich, making him history's only Bearer of the Knight's Cross of the Iron Cross with Golden Oak Leaves, Swords and Diamonds. Sounds posititvely fabulous, don't it?
To earn that honor, Rudel destroyed over 2000 targets, making it no wonder that even the designers of the A-10 Warthog and the leadership of the post-WW2 German Luftwaffe turned out to be gushing fanboys of his (even though the German government obviously didn't like to be associated with an unapologetic Nazi).