Rammstein

I was a Rammstein fan before I ever started learning German and I was shocked by how much vocabulary I had unintentionally absorbed over the years

Rammstein is pretty good to learn from because they speak so clearly.

And Rammstein of course

Rammstein have done wonders for me! ... 'Du Hast' - Great for learning basics of the accusative and the past tense. 'Frau und Mann' - Most of the lyrics are adjectives and their opposites... 'Ausländer' - Good for learning certain prepositions and directions. 'Deutschland' - Useful way to learn conjugations for verbs such as, Haben, Wissen, Können, Sein and Bleiben.

I actually started learning just so I could understand Rammstein songs. While a lot of their songs are considered "shock rock"n I've found that quite a few are actually poetic and even a little profound, or course thats just my opinion.

listen Rammstein if you just started out to learn, they have basic lyrics and songs like sonne even teaches you how to count

But I completely agree, their songs are really helpful for learners since Till Lindemann enunciates the words very clearly (sometimes a bit TOO clearly) and generally speaks slowly, so even an amateur learner like me could get what they're saying.

Und natürlich Rammstein auf jeden Fall, geniale Texte