Rammstein are great, their lyrics are pure genius but probably very hard to understand and impossible to translate for non-native speakers of German. Their live shows are also absolutely great too.?
Btw. Anyone who spread the rumor that they are Nazis most likely did so just because they are German. Rammstein played countless free anti-fascist gigs and stated several times (including in the song Links 2-3-4) that they are anything but fascist/Nazi/whatever.