That’s the unfortunate thing that even the Panasonic OLED TV’s are just as bad as mine for OSSC compatibility. I like the TV though so it’s such a shame in a way.
I’ll have a look at that tomorrow but in generic 4:3 you might get away with H Active 1920 and H Samplerate 2200 or higher to correct the aspect. You should get a picture at 2200 though. That should at least work for 1920×1080 but you’re going to lose a lot of vertical detail.