given your username... I assume you're actually asking her to be compared to Lily Pons, or Maria Callas, or Victoria de Los Angeles, or Joan Sutherland?
Or would you rather put her up against Mahalia Jackson, or Aretha Franklin, or her mother?
My answer would be no, but I really don't believe in "bests." (I wouldn't put her among my favorites, either, but that's just acknowledging full-on subjectivity).