When you ask about Van Halen... are you referring both generations of the band, Van Halen with David Lee Roth or Van Hagar? I would have to say early Van Halen.... once Hagar took over as front man, the music kinda sucked.
Sex Pistols, of course but not my fave
Iron Maiden, Bruce does not need a microphone for he is a human air raid siren.....

They've always sounded great.
All I want is to make a killing
To drill and kill that might be really thrilling
Why are my victims so unwilling
You can be sure that you won't see me
Careful with that axe you mean it