Those singers you enjoy,....that don't really have a great voice?

There was only 1️⃣ Gary Brooker. Just look at the effect he has on the band members as they try to match him with their playing! He elevates the whole affair.

I too, was surprised to see Gary Brooker's name on this list. Here is another sterling performance.

I liked Sue Foley, after several years of listening to her I'm done. Her pipes are horrid on most songs. 

Somebody mentioned Carole king, not a bad voice at all, great on her one good album.  And Roy Orbison had a voice like a song bird. Funny he's on here. 

Roger Waters

Tom Petty

Kurt Cobain