The best replacement for tobi is kakashi.

The best alternatives to tobi are rated as following:
★★★★★  kakashi
★★★★★  madara
★★★★  naruto
★★★★  konan
★★★★  pain
★★★  obito
★★★  itachi
★★★  sasuke
★★  minato
★★  deidara
★★  tobramycin
★  toby
★  konan episode
★  pein
★  kabuto
★  priori
★  priori xp
★  orochimaru
★  team kakashi
★  madara stronger
★  axiss
★  nagato
★  cayston
★  danzo
  pralaya
  uchiha madara
  naruto kakashi and guy
  naruto episode

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

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



Google Trends

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