Greasy Fork is available in English.
Creates a scrollable wall of full-size images from any user's instagram page, "tagged" page, or the instagram homepage. Just click the "Load Images" button at the top of the list of images/posts.
< Opiniones de Instagram full-size media scroll wall
The script already uses the largest size available. If you'd like, you can go in the code and adjust HEIGHT_PCT and WIDTH_PCT. Setting them to 1 should fit images within the window.
Could you add a setting that makes it use the source images instead, and make the source image automatically resize itself to fit based on the size of the monitor/window if the image width is too big?