Which bands have the best vocal harmonies?

I can't believe no one has said the obvious and one of the BEST most amazing vocal groups..

Gentle Giant!

If you want vocal harmonies that will make you cream your pants download the song Knots..

Also Spock's Beard does some killer stuff in tribute to GG.. ie. Thoughts pt.2.

Brandon
 
I adore vocal harmonies. They make my world go 'round. Seriously. A lot of these have already been mentioned, but here goes...

Lacuna Coil
Tristania
Blind Guardian
Queen
Tenacious D
Theater of Tragedy (A Distance There Is)
Battlelore
 
Pain of Salvation easily... no metal band approaches the sophistication and complexity of their vocal parts... and each member (except the keyboardist) can sing.


For old school prog... Gentle Giant.