hitting it big AND quality?
HAHAHAHAHAHAHAHA
seriously.... HAHAHAHAHAHA
i've got no doubts that you'd be able to find stuff like that. especially if you start looking into independent musicians. but that's the thing, they're independent, and therefore, not coming close to making it big. on the plus side the music is generally incredibly better than what you hear on radio or tv.
the issue of vocal harmony is a touchy one though, that's something i haven't heard much of in modern music aside from bluegrass stuff. most of the time now the vocal harmonies are all handled by the main vocalist by recording overdubs in the studio. you might not be disappointed in checking out some bluegrass too (sorry i don't have names to drop though, i only hear the stuff through my cousin)
but really, why do you want to listen to a new band that sounds like an old one? why not just listen to the originals? i mean if i want to listen to something like led zep i'm NOT going to listen to nickelback, i'm going to listen to led frikking zeppelin.