The best replacement for chief is samus.

The best alternatives to chief are rated as following:
★★★★★  samus
★★★★  chef
★★★  chief
★★★  leonidas
★★  captain
★★  peerless
★★  iron man
★  cap
★  commander and chief
★  chairman
★  cheif
★  samus aran
★  cook
★  solid snake
★  big man
★  chieftain
★  predator
★  editor-in-chief
★  deputy chief
★  editor in chief
★  captain america
★  space marine
★  arbiter
  gordon freeman
  ruler
  commander-in-chief
  assistant chief
  commander in chief
  commissioner
  noble 6
  e7
  marcus fenix
  doomguy
  editor in chiefs
  metroid
  editor
  kratos
  e-7
  boba fett

Your alternative for chief is not listed? Suggest!
Speaking about chief, one probably shouldn't forget about helmet halo 4.

Other search terms related to chief and their ratings are:
★★★★★ helmet halo 4
★★★ cortana
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chief
samus
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