Range? Singing like a girl makes you metal? Joey is kinda flat on half that song anyways. i guess i'm not metal i prefer my bands to have men singing, like Machine Head, Pantera, Slipknot, Faith No More, Living Color, Sevendust, Testament, Slayer etc etc..
Living Color? Slipknot? Sevendust?
Those are more metal than Dickinson? King Diamond? Halford?
Really!?!?!
Are you freakin' insane?
Iron Maiden is a metal band, through and through. As are Judas Priest. And don't even get me started on Mercyful Fate and King Diamond, which are total metal.
Don't get me wrong, I enjoy singers that do not have that range as well. I love Slayer, Motorhead and a bevy of death and black metal acts like Amon Amarth, Deicide, Morbid Angel, Emperor and Immortal. But, you absolutely can not say that just because someone has a large range and uses it, they are not metal.
Some of the best metal bands of all times have vocalists with range. Hell, even Pantera, whom you mentioned, exhibits range especially in their early stuff. Take a listen to Cemetary Gates or anything off of Power Metal. Phil sings high and low on that album.