Right, speaking of Windows software, nomacs is the best image viewer.
Covers my minimum basics for a default image viewer:
- Minimal UI
- UI can be entirely hidden
- press C to crop
- crop is just a draggable rectangle
- crop rotates
- arrow keys to move through images in a folder
- paste from clipboard
- scroll to zoom
There are other nice-to-have features as well~ Frameless mode is sweet.