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.
Terentii Shtykov
Terentii Fomich Shtykov (Russian:Терентий Штыков; Korean:테렌티 스티코프;  – 25 October 1964) was effectively the first supreme leader of North Korea, as the "de facto" head of its 1945-1948 military occupation and the first Soviet Ambassador to North Korea from 1948 until 1950. Shtykov's support for Kim Il-sung was crucial in Kim's rise to power, and the two persuaded Stalin to allow the Korean War to begin in June 1950.