Rammstein and Das Ich fit the stereotypical German sound for me. I love the red devil man - I think it’s mad!
Kraftwerk are classic!
But I was surprised when I came across
Ich + Ich - a soft and very listenable sound
http://www.youtube.com/watch?v=Q9VOo112F7M
and
Culcha Candela - worldly and punkish in attitude