North Korea
Kim Jong-un of the Kim dynasty is the current Supreme Leader or "Suryeong" of North Korea. He heads all major governing structures: he is Chairman of the Workers' Party of Korea, Chairman of the State Affairs Commission of North Korea, and Supreme Commander of the Korean People's Army. His grandfather Kim Il-sung, the founder and leader of North Korea until his death in 1994, is the country's "Eternal President", while his father Kim Jong-il who succeeded Kim Il-sung as leader was announced "Eternal General Secretary" after his death in 2011.
Kim Tu-bong
He and other members of the Yan'an faction formed the New People's Party when they returned from exile. After the New People's Party merged into the Workers Party of North Korea (WPNK) in 1946 at the 1st WPNK Congress, he became WPNK Chairman. He was the first head of state (Chairman of the Presidium of the Supreme People's Assembly) of North Korea from 1948 to 1957. He is most remembered in South Korea for his efforts in establishing the Korean linguistic field and especially that of Hangul. Much of his work both political and linguistically was done while living in China with the exiled government of Korea. He is also known by his pen name Baekyeon. He was purged by Kim Il-sung in 1957.