I noticed that many of the Mongolia civilization's great person in the game doesn't seem reasonable (most of whom are just rulers of the Mongol Khanate and have not shown talent in respective fields).
So I tried to revise the list of great persons and added some (most of whom come from the Yuan Dynasty and Ilkhanate. If anyone could provide great person from the Chagatai and Golden Horde or other eras, I would be very grateful!).
Here is the list(I added Wikipedia link for the newly added GP)
Great Prophet
Qiu Chuji(12th)(also Chinese GP)
Berke(13th)
Özbeg(13th)
Al-Allama al-Hilli(13th)
Aḍud al-Din al-Ījī(13th)
Drogön Chogyal Phagpa(13th)
Renaissance:
Zanabazar(17th)
Zaya Pandita(17th)
Global:
Bogd Khan(20th)
Great Artist
Huang Gongwang(13th)(also Chinese GP)
Zhao Mengfu(13th)
Guan Daosheng(female)(13th)
Guan Hanqing(13th)
Abu Sulayman Banakati(13th)
Saadi Shirazi(13th)
Tugh Temur(14th)
Industrial:
Dulduityn Danzanravjaa(19th)
Global:
Marzan Sharav(20th)
Byambyn Rinchen(20th)
Siqin Gaowa(female)(20th)
Great Scientist
Isa Khelmerchi(13th)
Nasir al-Din al-Tusi(13th)(also Persian GP)
Mu'ayyad al-Din al-Urdi(13th)
Jamal ad-Din Bukhari(13th)
Guo Shoujing(13th)
Zhu Shijie(13th)(also Chinese GP)
Renaissance:
Minggatu(17th)
Global:
Jamsrangiin Tseveen(20th)
Great Merchant
Mahmud Yalavach(13th)
Mengu Timur(13th)
Gaykhatu(13th)
Qawsun(13th)
Bolad(13th)
Pu Shougeng(13th)
Sa'ad al-Dawla(13th)
Kebek(13th)
Wang Dayuan(14th)
Renaissance:
Altan(16th)
Great Engineer
Guillaume Boucher(13th)
Liu Bingzhong(13th)
Zhang Wenqian(13th)
Araniko(13th)
Ismail(13th)
Wang Zhen(14th)(also Chinese GP)
Toqto’a(14th)
Toghon Temür(14th)
Global:
Li Siguang(20th)
Great Stateman
Sorghaghtani Beki(female)(13th)
Batu Khan(13th)
Urtu Saqaltu(13th)
Orghana(female)(13th)
Ghazan Khan(13th)
Temur Khan(13th)
Toqto’a(14th)
Dayan Khan(15th)
Industrial:
Balingiin Tserendorj(19th)
Global:
Khorloogiin Choibalsan(20th)
Tsakhiagiin Elbegdorj(20th)
Great General
Toghril(12th)
Subutai(13th)
Ögedei(13th)
Chagatai(13th)
Tolui(13th)
Möngke(13th)
Hulagu(13th)
Bayan(13th)
Khutulun(female)(13th)
Köke Temür(14th)
Tokhtamysh(14th)
Esen Taishi(15th)
Mandukhai(female)(15th)
Renaissance:
Anu Qatun(female)(17th)
Global:
Damdin Sükhbaatar(20th)