The title say it all.
My current nominee in no particular others are
Itachi :
Saveed Konoha from the destruction of the uchiha clan
Stop edo tensi
Prevent Naruto from dying against Edo tensi Nagato and from himself
helped reduce sasuke rage to some extent by telling him the truth inorder for him to make mature decisions .
Naruto:
Technically save konoha from pain invasion
Currently fighting Obito and Madara to stop the war
Tsunade:
healed an entire village in the pain arc
currently going to scarfice herself to save the hokages
Kakashi:
Kill Rin to prevent enemy from getting some secret from her
help keeping the team alive long enough against obito and madara inorder for better support to arrive
Sasuke:
Indirect save naruto from being extracted/control by danzo
Indirectly help naruto get strong /train hard enough/go some ballz to fight against powerful shinobi like obito and Madara
Indirectly help itachi stop edo tensi by keeping kabuto occupied without killing him
Indirectly reunite the kages in the summit inorder to fight upcomming war
Indirectly
My current nominee in no particular others are
Itachi :
Saveed Konoha from the destruction of the uchiha clan
Stop edo tensi
Prevent Naruto from dying against Edo tensi Nagato and from himself
helped reduce sasuke rage to some extent by telling him the truth inorder for him to make mature decisions .
Naruto:
Technically save konoha from pain invasion
Currently fighting Obito and Madara to stop the war
Tsunade:
healed an entire village in the pain arc
currently going to scarfice herself to save the hokages
Kakashi:
Kill Rin to prevent enemy from getting some secret from her
help keeping the team alive long enough against obito and madara inorder for better support to arrive
Sasuke:
Indirect save naruto from being extracted/control by danzo
Indirectly help naruto get strong /train hard enough/go some ballz to fight against powerful shinobi like obito and Madara
Indirectly help itachi stop edo tensi by keeping kabuto occupied without killing him
Indirectly reunite the kages in the summit inorder to fight upcomming war
Indirectly