would undoubtedly be the Waffen SS. I have interviewed many over the years and worked with HIAG and they are just remarkable people. They hold words like Honour, oath and loyalty dear and are still proud to have served their country.
They attained almost mythical status on the battlefield commanding respect however forced, from friend and foe alike. The true depiction of fire brigade units and everything a commander would want (on any side) in his formations going into battle.
It goes beyond the three premier units that most have heard from LAH, Das Reich, Totenkopf the Waffen SS was a unique formation in almost every respect.
However, closely behind and with an enourmous amount of prejudice would be the RAF of fighter command and Bomber command.
Mitch