Who do you like best on vocals for Black Sabbath?

Rob Halford: http://www.youtube.com/watch?v=R-4BthN-TjA

Glenn Hughs: http://www.youtube.com/watch?v=L1ijQxmYjOw

Ian Gillian: http://www.youtube.com/watch?v=j_ZMo4rSsKo

Tony Martin:http://www.youtube.com/watch?v=yNYLzVc53vs

Ronnie James Dio: http://www.youtube.com/watch?v=DJQQWbr4cXM

Ozzy Osbourne: http://www.youtube.com/watch?v=Uyz6uxH40h0

BQ: Did I miss any?
Doh! I just realized this isn't posted in Rock and Pop.