Blueberry by Jean Giraud. I know it's nitpicking - but, in this particular drawing the blanket roll is obviously far too big and the Apache is far too small. One tiny error amongst thousands of drawings isn't bad going.
I pulled this second image from this story because it offers a great example of Moebius drawing in the style of Druillet and producing some weird hybrid. (Heavy Metal issue July 1977 - Page 10 Approaching Centauri by Druillet and Moebius)