Best or favorite? I'd argue that GOT is the best, and it's probably not even close (despite the crappy GOT final season). That's not to say GOT is my favorite, or even in my top few. But top to bottom, it is the best.
Despite multiple attempts, I could just never get into The Wire, which never ceases to amaze me given that almost everyone who has some of my other favorites on their list usually includes The Wire.
That said, I like Yellowstone a lot better than The Wire, but I also fully admit that doesn't make it better. It probably doesn't even deserve being in the same conversation, honestly. And certainly nowhere near Breaking Bad, GOT, Sopranos, and Mad Men. But I grew up on a ranch and some of it hits close to home for me, so I like it better.
Anyhooo...not really sure where I'm going with this. Mostly just talking out of my ass, as usual I suppose.