(Bloomberg) - Akin Ongor, former chief executive of Turkiye Garanti Bankasi AS (GARAN), might walk with a spring in his step if he weren’t as modest and dignified as he is successful. The former national basketball player, 66, headed Istanbul- based Garanti for nine years, transforming it into Turkey’s largest bank by market value. His sport-team style management went onto the case-study curriculum at Harvard Business School, according to the Turkish-U.S. Business Council.