You should checkout the Fantasio series also by Franquin. It’s almost all in the 50s and 60s. It’s great! Interestingly, internationally, Franquin’s biggest success seems to have been the marsupilami. The art is amazing and he’s fun. I just wish it had been Gaston. M’enfin!
Spirou & Fantasio was an instrumental part of my childhood :) They even went grimdark at a certain point (https://fr.wikipedia.org/wiki/Machine_qui_r%C3%AAve) though that wasn't very well received. That and Le Petit Spirou.
