Got any specific numbers?

On the Intel side of things, I've seen my 14700K idle at around 5W (which shoots up to 300W under load, I find it greatly amusing) and my 12700H at 0.5W or less.

My 5900x, with core parking on and energy saving windows settings idles at 45W package power. Only two cores are really active, one each at ~2/3W. The others at <0.1W.

My 5950x idles at 35W. It's a known problem with AMD. It isn't the CPUs using the power its the uncore/SoC that eats the power.