The best replacement for grimm is disney.

The best alternatives to grimm are rated as following:
★★★★★  disney
★★★★  supernatural
★★★  once upon a time
★★  hans christian andersen
★★  scotto
★★  sleepy hollow
★★  perrault
★  mf doom
★  lost girl
★  grimm
★  mcmahon
★  doom
★  disney snow white
  disney cinderella
  grimm brothers
  fables
  rnje
  walt disney

Your alternative for grimm is not listed? Suggest!
Speaking about grimm, one probably shouldn't forget about stevie nicks.

Other search terms related to grimm and their ratings are:
★★★★★ stevie nicks
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Google Trends

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grimm
disney
supernatural