Robert Plant

It's true, at the Freddie Mercury Tribute he delivered a truly sad and dull (to put it mildly) rendition of Innuendo. But in the early years of his career (at least until '73), he sang divinely. In the seventies, off the top of my head, only an inexperienced Glenn Hughes and the unforgettable Ronnie James Dio can be compared to him (staying within the hard rock genre)... Then from '75 onwards it only got worse, but I didn't think (maybe no one thought) it would get so much worse...