This app can keep multiple widgets at screensaver since 2015.
I do like the multiple page system, so that the widgets alternate. Maybe that's something I'll implement as well. I however don't see a burn-in protected multi-widget option in the app, so that's something I could maybe do better :P
Anyways, first I have to finish the widget setup activity (which I'm currently working on), so that all widgets can be set-up and resized correctly