The Denver Broncos, even after day one of free agency, are still, by far, the best team in the AFC West, and I'm not sure it's close at this point. All of the Los Angeles Chargers, Kansas City Chiefs, and Las Vegas Raiders still have major roster question marks.
Now yes, it's only been one day-ish of free agency, but day one is typically when teams really make strides to try and improve the roster, as other methods of acquisition, like via the NFL Draft, typically don't yield immediate results.
Besides the Raiders getting into a spending frenzy, the Chiefs made some moves to a lesser extent, and this is also true with the Chargers, who finished second place in the division in 2025.