KC offense is ideal for Hunt. He did the best he can in Cleveland. Last season, he was playing through a core muscle injury. If he shows 70-80% of 2017-18 Kareem Hunt, he'll be problem and that's not good news for Steele and Perine. Other than speed, Pacheco's talent isn't better than Hunt's. Hunt has better vision, setting up blocks (patience), a better pass catcher, contact balance, breaks more tackles, forces way more missed tackles (elusiveness), and probably has a slight edge in pass pro.
CEH isn't as good as Hunt. Plus, he's unreliable at this point because of his ongoing health issues and mental health which makes his availability questionable. He can be the odd man out when he comes of NFI if Hunt starts to show out.