1. Hiruzen Sarutobi: Hiruzen Sarutobi, known as the Third Hokage, sacrificed himself in battle against the Kinkaku and Ginkaku brothers to protect Konoha. 

2. Tobirama Senju: Tobirama Senju, the Second Hokage, sealed away the First Hokage, the Second Hokage, and Orochimaru in a desperate situation during the Chunin Exams. 

3. Minato Namikaze: Minato Namikaze, the Fourth Hokage, sacrificed himself to seal the rampaging Nine-Tails and protect Konoha during its attack. 

4. Tsunade: Tsunade, the Fifth Hokage, almost fell victim to Pain and was nearly killed by Uchiha Madara, but was saved by Orochimaru and Team Taka.

5. Kakashi Hatake: Kakashi Hatake sacrificed himself to protect Obito during Pain's attack, using Kamui to drain his chakra, but was later resurrected.