see my post above. Please remove Darlene's last name. She legally dropped that name back in 1984.
On a side note, I'm really surprised to see Otus leading this poll. Not because I don't like him, but because he really didn't do that much for 1e outside of a few modules and Deities and Demigods. Did you know that of the 3 main core AD&D 1e books, he only has one image in all three? (the DMG, wizard getting shot in the face by a lich).
I think his most iconic work is from B/X. Just like Bill Willingham.