Tintin is not a French comic, is from Belgium. And the first two comics are controversial, but also a product of that age. Blue Lotus also depicts a terrible image of Japanese.

Asterix is more consistent, complex and rewarding for adults. A part of Asterix has dated also because the endless cameos of real people popular in that years don't mean so much for new generations.

Other European comic in the big leagues is the Spanish Mortadelo and Filemon. If Tintin is adventure and Asterix is clever wordplay, Mortadelo embraces directly sadistic fun in its wild own way. If you don't know them still, see the film "Mortadelo and Filemon: Mission implausible" for a good glimpse of that world. You'll thank me later.