What also comes to mind is Yoko Tsuno [1]. I'm not sure how well known this is in the US. The creator Roger Leloup was supporting Hegré on the technical drawings. For people who like the 'ligne claire' style, definitely check it out. The science fiction aspect of it might appeal to the audience on HN.
I was massively into Tintin as a kid in Ireland and when I met my Belgian wife she introduced me to this and I loved it. I was hoping I'd find it mentioned in here already!
[1] https://en.wikipedia.org/wiki/Yoko_Tsuno