The best replacement for borg is dominion.

The best alternatives to borg are rated as following:
★★★★★  dominion
★★★★  mcenroe
★★★  connors
★★  empire
★★  cybermen
★★  daleks
★  nobel
★  q
★  reapers
★  sorenstam
★  death star
★  edberg
★  bergman
★  jem'hadar
★  lendl
★  zerg
★  flood
★  voth
★  ulvaeus
★  jedi
  john mcenroe
  jimmy connors
  romulans
  dalek
  cylons
  species 8472
  terminator
  star destroyer
  aegis
  replicators
  wilander
  shadows
  ancients
  cylon
  necrons
  panatta

Your alternative for borg is not listed? Suggest!
Speaking about borg, one probably shouldn't forget about every bit of me.

Other search terms related to borg and their ratings are:
★★★★★ every bit of me
You have in mind a companion for borg and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of borg in all years. Click on graph for more.
borg
dominion
mcenroe