RB Chase Brown, Illinois
At some point, the Chiefs should honestly lean in on what their OL does best and just run north-south smashmouth football. It plays to Pacheco's strengths, they could elevate Ronald Jones and have him play supplemental snaps there, and honestly if they're committed to Brown/Humphrey/Smith/even Wylie, they should all the way in with the RB rotation.
That's Brown's style. He's not a huge wiggle guy, but he hits the hole violently and has fantastic top-end speed to beat DBs' pursuit angles (Brown is another track star). He's only 200 lbs but this is basically Darwin Thompson with more speed. His performance has grown every season.
The Chiefs probably have five 7ths this NFL Draft, and using one of them to fill out the bottom end of your RB stable is fair value, I think.