Best Vocalist of Metal (My own opinion)

ACCORDING MY EXPERIENCE, I CONSIDER THEY ARE THE BEST VOCALIST IN THE METAL HISTORY , IT'S A PLEASURE TO LISTEN.
THIS IS MY TOP 3.

1: RONNIE JAMES "DIO" (BANDS: ELF, RAINBOW, BLACK SABBATH, and DIO BAND)

PHOTO TAKEN FROM FACEBOOK OFFICIAL DIO

Song: "Heaven and Hell" (1980)

This is an example of his awesome voice. Rust in peace my hero. 

2. ROB HALFORD (BAND: JUDAS PRIEST) 

Song: "Diamond and rust" (1977)

Have you know that Rob Halford is a Gay Person?

3. Lemmy Kilmister (Band: Motörhead)

Song: "Ace of Spades" (1980)

With this song lemmy show us his powerful voice.