Interested in what screensavers OLED owners here use. Personally I just use the black screen, but it would be cool if there was something like the particle effect screensaver that the LG OLED TVs play when using a native app.
What are your favourites? 
Have a look at what is available. To be fair they are mainly slide-show type screensavers and it seems to be something not particularly catered for by Kodi, pretty much the same as music visualisation.
https://forum.kodi.tv/forumdisplay.php?fid=178
Personally, I used the “digital clock screensaver” which I have modified to suit my own taste / needs.
Also this What Is OLED TV? Best OLED TVs To Buy 2023 - Which?