Sorry, I had replied to this yesterday but that reply is now MIA, so I'm not sure what happened.
My display is not bigger than yours, so I can't send the screen shot you requested. However, I had the same problem even on smaller sized images. I first tried 1040x463, because that was the size of the placeholder that came with the quickstart. I then tried 1270x507, although I dont recall why, before trying 2080x936. No matter which size I used, the image was either cropped or zoomed in on.
What is the ideal size image to use in that module position?