Who is the greatest emperor in chinese history

A list of emperors who i think is the greatest.
Qinshihuang (Ying Zheng) – Qin Dynasty
Han Gaozu (Liu Bang) – Han Dynasty
Han Wudi (Liu Che) – Han dynasty
Sui Wendi (Yang Jian) - Sui Dynasty
Tang Taizong (Li Shimin) – Tang dynasty
Wu Zetian – Tang/Zhou Dynasty
Tang Xuanzong or Minghuang (Li Longji) – Tang Dynasty
Song Taizu (Zhao Kuangyin) – Song Dynasty
Yuan Taizu (Genghis Khan) – Mongol Yuan
Khublai Khan – Mongol Yuan
Ming Taizu (Zhu Yuanzhang or Hongwu) – Ming Dynasty
Ming Chengzu (Zhu Di or Yongle) – Ming Dynasty
Kangxi – Qing Dynasty
Yongzheng – Qing Dynasty
Qianlong – Qing Dynasty