Lowest TDP "consumer grade" (off the shelf) CPU? - eviltoast

Hello,

What would be the lowest TDP consumer grade CPU that I could get off the shelf? I’ve read that recent Intel “i” series are quite efficient, but I’m wondering which3/5/7/9 series (and maybe a model?) is “the best”.

I’m looking to self-host only a small amount of containers. 4k video output (or transcoding) would also be a great feat, even if nowadays I’m not using Plex that much.

Thank you