This app was mentioned in 5 comments, with an average of 1.80 upvotes
I tried with the Sony SW3 watchfaces app "https://play.google.com/store/apps/details?id=com.sonymobile.wearable.watchface2", but the micro apk just force closes after being installed on watch. It seemed to have some nice faces, but doesn't work on GWR.
Sony has some really nice additional watch faces and allows to configure them much further on your phone: link
I also like how the watch looks like in standby (low-color mode when it's not backlit) with white background, makes it really nice to look at in sun. Other than that I pretty much ended up uninstalling most apps I played with.
There's a useful gopro app (which I'll probably have to write from scratch by myself since I hate the layout),
I used to have the Mini Launcher and Wear Battery Monitor installed but they kept crashing every few hours so I got rid of them.