I once had a ticket to see the Verdi Requiem with the San Francisco Symphony. For some reason it was in the Civic Center, I can't remember why, and the mezzo was replaced at the last minute. My friends said "you will like this mezzo." They couldn't remember her name. I remember saying afterward in a horrified voice: "That was no extra mezzo. That was Dolora Zajick!" She was marvelous. I, of course, knew exactly who she was. She sang Azucena with Luciano on TV. She is appearing all over these days, singing new pieces, making the news. She is also a Richard Tucker winner.
She is one of the fat voiced mezzos, a group which includes Olga Borodina and perhaps Loraine Hunt Lieberson, someone I am looking into.