Use THEMEPARK from GOOD LOCK. You can literally make your own theme AND they added support for 3RD PARTY ICON PACKS, you can change your icons ON ONE UI HOME to ones from the Google play store.
LockStar, Routine+, One Hand Operation+, Penstastic, Wonderland, ThemePark, NiceCatch, Edge Touch are the only Good lock apps that are supported during beta program. These apps offer best customization that is still supported by Samsung. You may want to wait until final release to try 3rd party customization.
