Isa Gambar was the Acting President of Azerbaijan before Abulfaz Aliyev (Elchibey).
Abulfaz Elchibey (Aliyev) was the President of Azerbaijan before Heydar Aliyev.
Heydar Aliyev was the President of Azerbaijan before Ilham Aliyev.
Isa Gambar was the Acting President of Azerbaijan in 1992 from May 19 to June 16 after the military overthrow of the 1st President of Azerbaijan, Ayaz Mutallibov.
Abulfaz Elchibey was the 2nd President of Azerbaijan from 1992 June 16 to 1993 September 1, with Heydar serving as Acting President from 1993 June 24.
Heydar was the 3rd President of Azerbaijan from 1993 June 24 to 2003 October 10. After Heydar's death due to heart failure, his son, Ilham, became the 4th President.