s-: Muhammad, King Hyeonjong of Goryeo (the only S-tier among great figures in Korean history), Wan-Agolta, etc.
a+: Emperor Han, Sima Qian, King Xiaolin, Taizong of Tang, Yayul Abogi, Oda Nobunaga, Syngman Rhee, etc.
a: Baekgi, Jojo, King Sejong of Joseon, Yi Sun-sin, Park Jung-hee, etc.
a-: Wang Jeon, Zhuge Liang, King Gwanggaeto, Wang Geon, etc.
b+: Wu Zishu, Shang Yang, Qin Shi Huang, Emperor Wu of Han, Emperor Sui, Emperor Kangxi of Qing, etc.
b: Lee Mok, Hanshin, Sima Yi, Kwak Jaui, Tokugawa Ieyasu, Fukuzawa Yukichi, etc.
b-: Khalid ibn al-Walid, Wanan Jinhwasang, etc.
c+: Liu Bei, Son Kwon, Kim Gu, etc.
c-: Yeongaesomun, Yuebi, etc.
d+: Kim Il-sung, etc.
d-: Gwanghaegun, King Gojong of Joseon, etc.
f+: Joseon artificial light
f: Yeonsangun, etc.