The best replacement for snape is snape.

The best alternatives to snape are rated as following:
★★★★★  snape
★★★★  harry
★★★  mcgonagall
★★★  voldemort
★★★  dumbledore
★★★  james
★★  bellatrix
★  minerva
★  sirius
★  professor mcgonagall
★  james potter
★  lockhart
★  harry potter
★  umbridge
  gilderoy lockhart
  sirius black
  bad snape
  moody

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

Other search terms related to snape and their ratings are:
★★★★★ hermione
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