Qara Iskandar was the ruler of the Qara Qoyunlu tribal confederation from 1420 to 1436. His struggles with the Timurid ruler Shah Rukh show that he was a brave leader, but he was not able to continue
Contemporary depiction of Qara Iskandar, c. 1430
Iskandar ibn Qara Yusuf (left) in battle against the Timurid Ibrahim Sultan (right) in April 1429. Shahnama (1430), Bodleian Library, ms. Add 176, folios 6r-7v.