Best Male Singers of the 20th Century


There is an interesting current discussion about the best female vocalists on CD. I have my own ideas about the best male singers (any category) of the 20th Century, but would like to hear other opinions.
sdcampbell
Rob Halford, then its the King (Diamond of course), then Bruce Dickinson. Or reverse the order of the second two. Clearly the top three.
Thanks,
Chris
David Bowie, if intensity & diversity of styles are the criteria used to judge the "best". He's in the same league with Freddie Mercury.