kind of an obscure band but Jimmy Gnecco of Ours is probably the best vocalist i've ever seen. they opened for somebody, and i had never previously heard of them. i remember my jaw was on the floor the whole time. dude has some serious pipes.
I don't know who currently is but apparently Axyl Rose has the widest vocal range of any singer in history.
http://www.huffingtonpost.com/2014/05/20/top-artists-vocal-range_n_5357698.html
As far as technical difficulty goes, it has to be this guy.
He can sing B4 and transition into C5 - C♯5 range with ease. In the last minute of the vide you would hear him hit the D5-E5-G♯5 combo and end with a G5 which is super hard in all accounts.
https://www.youtube.com/watch?v=dQw4w9WgXcQ
Interesting list, thanks. Oh and Axl is amazing
Yea apparently Axl hits all the highs and all the lows. His range for singing is basically worldclass. Its too bad GNR had to break up because he was busy doing heroin and hitting his girlfriend in the head with empty wine bottles.
If we're being serious it's obviously Thom Yorke