Konoha: Itachi or Orochimaru
Kumogakure: Ginkaku & Kinkaku
Sunagakkure: Sasori
Iwagakure: Deidara
Kirigakure: Kisame
Takigakure: Kakuzu
Hidden Grass: Hidan
Amegakure: Technically both Akatsuki and Hanzo as during each's rule technically the other would have been an enemy
Kumogakure: Ginkaku & Kinkaku
Sunagakkure: Sasori
Iwagakure: Deidara
Kirigakure: Kisame
Takigakure: Kakuzu
Hidden Grass: Hidan
Amegakure: Technically both Akatsuki and Hanzo as during each's rule technically the other would have been an enemy