Bruce Dickinson (Iron Maiden) = 10 - one of the all time greats, and is still as good as ever.
Blaze Bayley (Iron Maiden, Blaze) = 9 - I like his vocals on TXF, really fits the mood, but he came into his own in Blaze, and is reaching his full potential. Awesome.
Paul DiAnno (Iron Maiden) = hmm...hard to say...I quite like his voice, but am not sure of his singing ability...maybe a 5
James Hetfield (Metallica) = 8 - a great voice for thrash, sounds
awesome on ..AJFA
Dave Mustaine (Megadeth) = 7 - another great voice for thrash, but not as good a vocalist. Love the vocals on SFSGSW though!
Rob Halford (Judas Priest) = 10 - Painkiller! Live Insurrection!
Ozzy Osbourne (Black Sabbath, Ozzy) = 7 - the guy can't sing, but fuck what a cool voice. Uniquely untalented, but an awesome voice.
Ronnie James Dio (Dio, Rainbow, Sabbath) = 10 - as Troops said, the power behind Ronnie's vox could take down a brick wall! No-one has a voice like Ronnie!
Sebastian Bach (Skid Row) = 8 - haven't heard alot, but I like what I hear.
Axl Rose (Guns N Roses) = 7 to 8 in the studio - hes good at what he does but doesn't hold up that well live....better than everyone gives him credit for, but still not that great.
Matt Barlow (Iced Earth) = 10 - excellent range. Go listen to the whole BO album, NOW!
Hansi Kursch (Blind Guardian) = 9 to 10 - incredible talent, and sounds awesome on 'Somewhere Far Beyond' and D&W.
Danny Cecati (Pegazus, Eyefear) = 8 to 9 - very powerful!
James LaBrie (Dream Theater) = 8 in the studio, less live..
Lord Tim (Dungeon) = 9 - awesome sounding voice, and very versitile (sp?)...TRAUMATISED!!
Phil Anselmo (Pantera) = 9 on CFH..
Chuck Billy (Testament) = 8 - excellent at the low growly shit, listen to 'Demonic' for proof.
Chris Boltendahl (Grave Digger) = 8 - I dunno what it is, but god I love this guys voice! It is probably his thick accent or something, but it just sounds awesome, and the guy can sing, great range.