The best replacement for gatlin is asafa powell.

The best alternatives to gatlin are rated as following:
★★★★★  asafa powell
★★★★★  bolt
★★★★  usain bolt
★★★★  powell
★★★★  gay
★★★  yohan blake
★  tyson gay
★  asafa
★  lemaitre
  gatling

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Speaking about gatlin, one probably shouldn't forget about oak ridge boys.

Other search terms related to gatlin and their ratings are:
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