You know, I thought about adding Diezel and ENGL (Bogner & Friedman too), but I didn’t feel like they changed the game like the amps I listed.I'd have to add a Diezel to that list, probably VH4 and/or Herbert since they're the most well known. I'd also want to add something from ENGL to that list. ENGL typically falls into Invader style or Savage style so maybe one or both of those.
In general German high gain like Diezel or ENGL have a distinct character that you don't find in British or American style high gain amps.