I count seven players who had significant time with the Cubs during the Topps era and ended up in Cooperstown - Ernie Banks, Andre Dawson, Fergie Jenkins, Greg Maddux, Ryne Sandberg, Ron Santo, and Billy Williams.
Care to guess how many other cards there are besides the '94 Sandberg?
The others never made it.
Ernie Banks won the MVP in 1958, but in the '59 set Bob Cerv was #100 and NL President Warren Giles got #300.
In 1959 Ernie won the NL MVP for the second time, but that didn't get him a hundred number in 1960. However, Rocky Colavito (#400) and Johnny Temple (#400) did.