Back when power metal was, well, powerful, Helloween formed. They are largely
considered a pioneering band in the style and with good reason. The German band was a direct influence on Blind Guardian, among others. And thus the European power metal style was formed. Helloween continued to put out great albums, although they have certainly released a few lackluster ones as well. Their output today though is just as good as it has ever been.
FAVORITE ALBUM: WALLS OF JERICHO