The best replacement for creepers is doc martens.

The best alternatives to creepers are rated as following:
★★★★★  doc martens
★★★  iron golems
★★  dr martens
★  climbers
★  docs
★  60 wolves
★  pumpkinhead
  villagers
  demonia

Your alternative for creepers is not listed? Suggest!
Speaking about creepers, one probably shouldn't forget about frilly socks.

Other search terms related to creepers and their ratings are:
★★★★★ frilly socks
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Google Trends

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creepers
doc martens
iron golems