The best replacement for kaiba is yugi.

The best alternatives to kaiba are rated as following:
★★★★★  yugi
★★★★★  pegasus
★★★★★  ishizu
★★★★  joey
★★★  noah
★★  bakura
★★  marik
★★  jaden
★★  zane
★★  siegfried
★★  yugi battle city
★  zigfried
★  dartz
★  alister
★  gozaburo
  yusei

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

Other search terms related to kaiba and their ratings are:
★★★★★ yugi
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Google Trends

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kaiba
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