There have been some great voices in rock... On the male side, I'd go with Marvin Aday, Roger Daltrey, Ronnie James Dio, Bruce Dickson... For women? Benatar, Ann Wilson... And I'm sure I'm forgetting something...
Oh... And...
https://youtu.be/DnozXsDt6F4(and damn you autocorrect!)
And damn, but I was right the first time - I thought I'd gotten autocorrected when I looked back...