I'm 78, and I can only compare the current pitchers to the pitchers that I have seen pitch from the mid 1940's on.
Red Ruffing, Spud Chandler, Bob Feller, Sal Maglie, Van Mungo, Ralph Branca, Steady Eddie Lopat, Smokey Joe Page, Preacher Roe, Hal Newcombe, Satch, Allie Reynolds, Vic Raschi, Johnny Sain, Ewell Blackwell, Johnny Vander Meer, Hal Newhouser, Warren Spahn, Bill Voiselle.
To try to compare anything before that, would be a mental fairytale.