The best replacement for kakashi is itachi.

The best alternatives to kakashi are rated as following:
★★★★★  itachi
★★★★★  sasuke
★★★★  zabuza
★★★★  pain
★★  orochimaru
★★  obito
★★  guy
★  tobi
★  naruto
★  yamato
★  gaara
★  gai
★  kabuto
★  kakuzu
★  tsunade
★  madara
★  kisame
★  pein
★  deidara
★  jiraiya
★  hidan
  minato
  toby
  itachi episode
  haku
  neji
  sasuke shippuden
  sakura

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

Other search terms related to kakashi and their ratings are:
★★★★★ sharingan
★★★ sakura
★ mangekyou sharingan
You have in mind a companion for kakashi and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of kakashi in all years. Click on graph for more.
kakashi
itachi
sasuke