Like dictor says above, pay attention to the TYPE of HDMI cable you get.
There are various "grades", and if you get one that's "too low", you may not get a good result.
Look for "high speed" and "HDMI 2.1" as part of the cable specifications (it may cost a little more than others).
Also, if possible read the user reviews to see if it worked for others in similar situations.
The tv is 4k, correct (I'm going to guess that almost all the OLED panels are)?