I knew one of you wouldn't be able to resist.
I never said ole Percy was as gifted as singer as Freddie. I even said Freddie was the better singer and leagues ahead of anyone else in rock. But I HAVE seen, on various occasions, the comparison between Robert and Freddie in terms of basic vocal power. But I don't look at LZ through rose-colored glasses just because I'm a big fan. I realize they sucked live starting around '74 when it was rumored that Plant had vocal surgery after Houses of the Holy and Jimmy was putting God knows what into his body. But you look on just about any top rock vocalists list and Robert AND Freddie are always near the top, with Freddie soaring high above pretty much anyone. He's a polarizing character but you can't deny the man has talent.
Oh, and LZ still was a killer live act if not just for their music and much less Robert's voice beginning to falter.
Also, I think some people may sell Freddie short in this poll just because Paul was in the Beatles (aka the "best band ever")