2. Diamond Head - Lightning to the Nations - (1980)

Until Maiden released
Powerslave this was the best NWOBHM album ever recorded, and they can still go head to head pretty fairly. Heavy, catchy, complex, and just perfectly written, this album bridged proto and trad metal to what metal would become in the eighties and beyond as much as anything Priest or Maiden ever released. Front to back there isn't a filler song on here.