So, I was thinking, who, in your opinion, is the best vocalist, guitarist, drummer... you name it... in the Metal scene? (Sub genres and rock may be included)

I'd go for:

Vocalist: Jorn Lande (Masterplan, Allen-Lande.. and many others.)
Guitarist: Joe Satriani (Deep purple, and others) and John Petrucci (Dreamtheater)
Drummer: Mike Portnoy (Dreamtheater)
Bassist: Steve Harris (Iron Maiden) and Cliff Burton (Metallica)