There are numerous head on or tail on shots of the Falcon in the OT. Most are very fleeting as the camera, ship, or both are moving. One notable longer shot is the Falcon entering the Death Star hangar bay. It lasts several seconds and is dead on the nose just like the Ohrai poster (although the stylized version of the Falcon in the poster looks a bit more “Close Encounters of the Third Kind” which makes it feel a bit more exotic and UFO-ish imo)

https://www.youtube.com/watch?v=GHFhp594RlU&app=desktop&persist_app=1