I bet you might not have known all of them, no matter they were titular or substantial figures in their terms, that some were as short as several months only.

民国时期的22任总统都有谁？除了中山先生，其他的人各个都是狠角色-今日头条 (toutiao.com)  

After 1949, there had been "region leaders" on the island if you do not like them to be called as "governor of Taiwan Province".