1. Shisui Uchiha: Shisui was a prodigy of the Uchiha Clan and the strongest genjutsu user in the ANBU. 

2. Itachi Uchiha: Itachi, another genius of the Uchiha Clan, quickly rose through the ranks and became the captain of an ANBU squad at the age of 13. 

3. Kisame Hoshigaki: Kisame was known for his willingness to protect his village's secrets and was one of the strongest members of the ANBU. 

4. Kakashi Hatake: Known as the "Cold-blooded Killer" and "Copy Ninja," Kakashi was known for his ruthlessness and was considered one of the elite in the ANBU. 

5. Yamato: Yamato, who possessed the Wood Release Kekkei Genkai, was considered one of the top ninjas in the ANBU.