Call it the staircase poster before the staircase poster. This image of Rhett carrying away a swooning Scarlett, seen here on a 14x22 poster from 1941, was a highly prevalent one in GWTW poster art from its inception as part of the movie's 1941 ad campaign through the early 1960s.
Also, in the interest of full disclosure, I have to admit this might be my least favorite GWTW poster ever. Scarlett looks passed out and Rhett is sporting one hell of a creepy leer. Not adding to the poster's general sense of class? The tag line "Rhett takes Scarlett in his arms!" That's fine, of course- I just rather prefer to imagine she was conscious for it. So, yeah, I'd even take the Polish love fans poster of this one here!