I don't like Windows 10 photo gallery app, so I use a reg hack to get the old windows 7 photo viewer back. I like to also change the background color to black. The only thing that looks corny is the light grey file menu at the top, which I would love to get rid of. I have never used any of the options in those menus and it's an eyesore. Any reg hacks to get rid of this menu at the top?
And I've used IrfanView as my photo viewer forever. It's a helluva lot faster than Microsoft's photo viewer, and has a ton of options to configure it the way you want. In full screen mode it can be set to use all of the screen to display the picture, no overlays or buttons or menus. If the photo doesn't fill the entire screen, there's an option to use the average color of the photo as the background color, so it's less distracting. You can use the mouse to rapidly (like 60 fps) flip through photos in a folder. It has all sorts of useful functions like batch rotation (if for some reason the photos aren't tagged with an "up" direction) and photo enhancement filters. The list goes on and on and on. Give it a shot.