The quality of offensive play is down across the league this year, including the Chiefs, but your question is still a good one.
In the AFC, the Ravens and Miami on a good day possibly, but they both have a habit of poor play late in the season.
In the NFC, the 9ers have a well rounded team and the coaching that could get the win. The Eagles on a good day. I'm reluctant to say the Lions even though they are playing well.
Ball security is the key to beating the Chiefs. Turnovers are always game changers, this year especially. Turnovers will be huge for any team against the Chiefs.
If Zay Jones gets healthy, the Jaguars have the firepower to beat them. The Jags defense stifled them back in September. The Ravens have the speed at the second level to match up. I think a healthy 49ers team teabags them.