This is possible with darktable. Just import all new images with 0 stars and set a filter for only images with 0 stars. Then, go to the first image and apply a rating. This automatically brings you to the next image. By pressing f11, alt-1 and then tab before, you will get a full screen image. Alternatively, you can use z or ctrl-z to have full size previews without or with sharpness indicator, but the navigation becomes less obvious then, at least in some corner cases.