Interesting list, surprised to see Doug Pinnick on there. I'm mainly familiar with his bluesy style with Kings-X in the early 90s and would not have suspected he had that kind of range.
Or Geoff Tate.
Or Captain Beefheart
Low yo-yo
Devin Townsend?
Floor Jansen?
It says a lot about the value of this list that Katy Perry is there but Devin Townsend isn't.... /shrug
Greetings, fellow prog-metal buddy.
or King Diamond
I named my dog Abigail
(from the album with the same name)
Honestly, you could make an entire list of greatest singers just by looking at whoever worked with Ayreon. That project introduced me to SO many great singers and bands.
Jorn Lande!
Eric Adams?
David Lee Roth?
Michael Kiske (Halloween) and Rob Halford (Judas Priest) also had decent ranges.
DLR was more of a showman than he was a singer but Halford... now THERE is a singer with range!