OZZY.
Freddie Mercury
Definitely Freddie.
daltrey
Serj Tankian Signed, million man.
Good pick!
I'm a SOAD fan, but no.
Ronnie James Dio
Steve Perry.
If we're going just on raw charisma and audience command probably prime Elvis. Mick and Freddie Mercury would be up there as well.
Dave Grohl - tremendous energy and rapport with the crowd.