Yeah, it's him. No doubt about it.
But anyway, this is a silly argument. Yes, SOME metal resembles SOME classical in form and in content. Yes, SOME metal is directly influenced by SOME classical. No, not all metal derives from classical, and obviously metal involves its own unique innovations.
The relationship isn't even that important. There's nothing intrinsically good about the classical form. Metal can (and probably should) be assessed on its own merits.
This is what matters:
a.) Metal explores the human state in its most remote extremes... those parts of the psyche and imagination that are typically regarded as inhuman or inaccessible, alien, dangerous, etc, etc. Death, magic, warfare, and raw formless power, etc, etc.
b.) Metal takes all of that ugly darkness and wilderness and makes something orderly and beautiful out of it.