Admittedly Dizzy Dean wasn’t the best choice, though I would take him over Glavine.
But again try
Cristy Mathewson, Walter Johnson, Bob Feller, Sandy Koufax, Bob Gibson, Tom Seaver, Tom Glavine
Which one doesn’t fit?
Hell Glavine isn’t even up there on a list of best pitchers of his Generation
Maddux, Randy Johnson, Pedro Martinez, Roger Clemens (even without the PED), Oral Hershiser, Mariano Rivera were all more dominant than him