I recommend the Thermal Grizzly Kryonaut, works well for me.

I've had great results using Noctua NT-H1 thermal paste on my 13900K. It's easy to apply, has low viscosity, and provides excellent thermal performance. Plus, Noctua is a trusted brand in the PC cooling space. Just be sure to clean off any old thermal paste from your CPU and cooler before applying a fresh layer.

Don't overthink it too much. Most name-brand thermal pastes will work fine. I'm using the Noctua NT-H2 on my 13900K and temperatures are good. Just make sure you apply it correctly (pea-sized dot in the center) and pair it with a beefy cooler. The 13900K runs hot, so your choice of cooler is more important than minor differences between thermal pastes.