Moebius, who's true identity is Jean Giraud, is a French comics artist who is most popular for the comics that he publish in Heavy Metal Magazine in the 70's and 80's. You can look at his website here, but it was pretty hard to navigate, for me. (probably because it was in french) I also found this great website which has a ton of really big images here. And you can actually read Arzach, which was published in Heavy Metal here.
Also you should look at this really cool Moebius gif.