The best replacement for monk is priest.

The best alternatives to monk are rated as following:
★★★★★  priest
★★★  barbarian
★★★  rogue
★★  friar
★★  warrior
★★  druid
★★  bruiser
★★  demon hunter
★★  dragoon
★★  shaman
★★  paladin
★  crusader
★  maori warrior
★  psych
★  hunter
★  barbarian diablo 3
★  dk
★  mongoose
★  maori
★  bruiser eq2
★  warrior 5.4
★  maat
★  mage
★  warlock
  rogue 5.4
  michael irvin
  tae kwon do master
  crusader diablo 3
  monkey
  nun
  mannix
  dragoon ffxiv
  witch doctor
  tae kwon do
  warrior wow
  wizard d3
  exorcist
  ritualist
  columbo
  hermit
  pally
  priest wow

Your alternative for monk is not listed? Suggest!
Speaking about monk, one probably shouldn't forget about coltrane.

Other search terms related to monk and their ratings are:
★★★★★ coltrane
★★★ john coltrane
★★ fist weapons
★★ nina conti
★★ skorn
★ marko
You have in mind a companion for monk and it is not yet here? Propose!



Google Trends

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monk
priest
barbarian