I was gonna get into a post about semantics and how "vocalizing" and "singing" could technically be different, but I don't honestly care enough to argue about it.
The thing of it is: some people are great singers for their own work. Geddy Lee is great because Rush are great and his voice (like it or not) is an essential part of that. Joakim is great because Sabaton are great and his voice (technically gifted or not) is an essential part of that. Robert Smith is great because The Cure are great and his voice (weird and weak or not) is an essential part of that.
Lzzy Hale is a good singer in a band that doesn't really matter. She's just good at singing. To quote KK, "It is what it is."
I fucking love Tom Waits, but if someone said, "OKAY but who is a better singer, Tom Waits or Celine Dion?!!!?!!" I wouldn't even consider Tom Waits as an answer. I prefer Tom Waits. Tom Waits is a better songwriter. Tom Waits is a better artist. Tom Waits has the perfect voice for Tom Waits songs. But he has the voice of a drunken preacher that swallowed a toad. It's that simple.
I'mma move over to the Drunk Posting thread meow...