Not all Kraut bands sound like the Scorpions, Nofi, some of zem even zing ze blües in Deutsch. Like the iconic Interzone which were in my book the best German singing band ever. This will probably sound grating and alien to you native English speakers, but Heiner Pudelko, their late lead singer (brain tumor, no, he wasn't gay), phrased our schöne langwich like no other. He sang the blues as if it was invented in East Prussia where he was born.
Most people attempting to sing blues in German phrase it like English. Jule Neigel, talented as she is, is one of those "Germenglish"-singers. I suppose her lead guitarist saw one SRV vid too many.