If we include doo-wop, R&B, the MoTown sound, the California surfer sound, etc., as part of rock history, we then need to include a lot of other candidates for "best voice". I propose that we revise the thread to better define the categories of rock, and then choose the "best voices" in each category. Here the link to the Rock 'n' Roll Hall of Fame that lists all of the inductees:
http://www.rockhall.com/hof/allinductees.asp
Any suggestions for categories?