The best replacement for sherlock is jack the ripper.

The best alternatives to sherlock are rated as following:
★★★★★  jack the ripper
★★★★  elementary
★★★  jack the ripper walkthrough
★★★  moriarty
★★★  doctor who
★★  sherlock holmes
★★  breaking bad
★★  arsene lupin
★★  watson
★  dexter
★  sherlock
★  house
★  sheldon
★  hammer
★  luther
★  true detective
  l
  hammer bubbler
  custom flying v
  mycroft

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Speaking about sherlock, one probably shouldn't forget about moriarty.

Other search terms related to sherlock and their ratings are:
★★★★★ moriarty
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sherlock
jack the ripper
elementary