The best replacement for wizard is sorcerer.

The best alternatives to wizard are rated as following:
★★★★★  sorcerer
★★★★  warlock
★★★  witch
★★  demon hunter
★★  witch doctor
★  barbarian diablo 3
★  archer clash of clans
★  sorcerer pathfinder
★  sorcerer aura kingdom
★  wizard
★  sorcerer 3.5
★  jedi
★  monk diablo 3
★  magician
★  crusader
  witch doctor d3
  time bandit
  demon hunter d3
  aviar
  sage ragnarok
  radio popper
  dog
  marathon
  warlock fiesta
  sage ro
  htc apache
  cuttlebug
  mage
  sage
  sorcerer ddo
  patternmaster
  sorceress
  template
  h&r handi rifle

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Speaking about wizard, one probably shouldn't forget about data tracking.

Other search terms related to wizard and their ratings are:
★★★★★ data tracking
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Google Trends

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wizard
sorcerer
warlock