Kuja
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Lemmy from Motörhead
Bony Iommi
I'm pretty sure Roger Waters was a heavy smoker, but his voice really hasn't deteriorated all that much (if at all) since his Pink Floyd days. I saw him on his tour for "The Wall" four years ago and he sounded almost exactly like he did in 1979-1981.
Anonymous
John Lennon and David Bowie
?
Freddie Mercury smoked, although I cannot say if it was heavily or not.