Moebius works are obviously something I'd recommend, but there are so many and so different ones. Space stuff? John Watercolor et la redingote qui tue is wonderful but doesn't look like this at all. I'd recommend the Incal series which is a masterpiece, but there are also several short series from the -70 which I don't know the names of, I can check them out when I get back home (away atm).
Valérian et Laureline is heavy space 1970-80 which have influenced me heavily. Good BD IMO :-)
On a side note, I did read Filemon too, maybe it junked me away from more traditional thinking when it comes to drawing and creativity. You are allowed to do whatever you want :-)
Barbarella was really something too back in the male dominated space.