Nazareth.
I've long been convinced of the best rock guitarist* - Jimi Hendrix, the best rock drummer - John Bonham, and the best rock bassist - Noel Redding, but I've not been sure who I'd have on vocals in my ideal rock band. I think Dan McCafferty gets the gig.
* Although it's astonishing that Manny Charlton is sooooo underappreciated.