Looking for an idiom

[vicky_molokh]

Depending on what exactly you want to achieve, some assembly might be required. First, one of the more common rude-ish ways to refer to a German in Russian was Fritz (Фриц). A rather universal Ukrainian noun for an 'evil' foreigner would be песиголовець/песиголовці (pesygolovets/pesygolovtsy), literally dog-head. Those are two terms that I've heard old people use when telling about the war.

Golden would be zolotoy (золотой) in Russian and zolotyy (золотий) in Ukrainian. The spelling changes in accordance with the noun modified, the usual Slavic complications.
While anachronistic (dating from 80s onward), the term Golden Youths (золотая молодёжь) in Russian seems harsher than the the British analogue. It means young people who can live in leisure thanks to their parents' money/patronage, and have little to no talent/skill/etc. of their own. As I said, it's probably not what you need, since it doesn't imply any serious capability, aside from calling a bigger fish.

While the Russian word for the term Übermensch is Сверхчеловек, and Ukrainian is Надлюдина, I think a direct transliteration (roughly Уберменш) is plausible in the context of a Weird War II setting. Notably, it sounds distinctly German to Slavic ears, and can probably accept an adjective like золотой. It also implies both great power and a capability/willingness to abandon morality.

Finally, also somewhat anachronistic, золотые пацаны would literally translate as golden boys, but with the noun having an intrinsic aspect of roughness, also possibly petty and/or vandalistic tendencies.

I'm making no attempts to find any more explicit terms, and my age makes all choices based on second-hand accounts at best.
Warning: words may mutate unpredictably depending on sentence, and appear larger in mirrors.

If they don't show up on their own, you can try inviting Walrus and Moldon to this discussion.