50 m fiber optic would be a nice clean option with it possibly having enough length to use some cable clip adhesives to clip along the baseboards instead of taking the direct straight route to the TV where people would be walking over the cable.
These are the type of clips I used to secure my fiber optic hdmi cable to the baseboard to the TV.
https://www.youtube.com/watch?v=i2xP4cWoJtU
If you want it to be less visible you could use cable raceways, but I was lazy and didn't feel like spending more than I had to.