Oomph! is generally the first thing people recommend. It's been a very long time since I listed to this type of music and I don't know what they've been up to r

Oomph! is generally the first thing people recommend. It's been a very long time since I listed to this type of music and I don't know what they've been up to recently ("recently" meaning "last 20 years"), but the Sperm and Defekt albums from the 90s are pretty good. I also really liked Pitchshifter at the time, especially the first few albums (later they switched styles a bit, starting with the pitchshifter.com, which is also pretty good). It's a bit different from Rammstein from what I recall, but can't hurt to try.