I agree that a guy who was around for decades post-WWII can't really be considered a tough signature, except perhaps for the occasional d**k who won't sign [like Neil Armstrong or Mike Marshall] or a few foreign players who disappeared back to South America when their careers ended. What's more challenging with postwar HOFers is trying to find specific items signed by them. I wanted a Satchel Paige for a long time but only on a card signed during his career. I finally got one this year:
A Groucho autograph can be had readily but try finding one on a Bowman card:
