Disturbed – the band
They have a mix of classic metal, and old rock with something new. Their music sometimes sounds like it is not so heavy, and in the same time it is strong with a modification of a singer’s voice.
As Wikipedia says: Originally classified as a nu metal band, Disturbed is now regarded by some music critics as hard rock or heavy metal, although others now regard them as alternative meta.
Recommendations of songs:
Land of confusion – the most famous
Decadence – example of a harder song