It is a nu band (heavy metal blending in other elements like hip hop
Neither. They are a psychobilly band (psychobilly is a sub-genre of punk music).Also, "metal" and "heavy metal" are the same thing.
Disturbed is a heavy metal band. Heavy metal and metal are one in the same. THey mean the same thing. Disturbed is not Nu metal, they don't rap (they only thought 'cause he sang really fast), they...
Iron Maiden and Metallica
You need to be more specific. I can name a couple of hundred. but I'm not going to.