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.