Duan Qirui
https://en.wikipedia.org/wiki/Duan_Qirui
Li Yuanhong
https://en.wikipedia.org/wiki/Li_Yuanhong
Zhang Zuolin
https://en.wikipedia.org/wiki/Zhang_Zuolin
Wu Peifu
https://en.wikipedia.org/wiki/Wu_Peifu
Sun Chuanfang
https://en.wikipedia.org/wiki/Sun_Chuanfang
Feng Yuxiang
https://en.wikipedia.org/wiki/Feng_Yuxiang
Yan Xishan
https://en.wikipedia.org/wiki/Yan_Xishan
By unify China, I mean that they meet or exceed the benchmark set by Jiang Jieshi and the Guomindang (which arguably falls short of true unification) from 1926 to 1949. They need not meet the benchmark established by the Communists in 1949 and after.
https://en.wikipedia.org/wiki/Duan_Qirui
Li Yuanhong
https://en.wikipedia.org/wiki/Li_Yuanhong
Zhang Zuolin
https://en.wikipedia.org/wiki/Zhang_Zuolin
Wu Peifu
https://en.wikipedia.org/wiki/Wu_Peifu
Sun Chuanfang
https://en.wikipedia.org/wiki/Sun_Chuanfang
Feng Yuxiang
https://en.wikipedia.org/wiki/Feng_Yuxiang
Yan Xishan
https://en.wikipedia.org/wiki/Yan_Xishan
By unify China, I mean that they meet or exceed the benchmark set by Jiang Jieshi and the Guomindang (which arguably falls short of true unification) from 1926 to 1949. They need not meet the benchmark established by the Communists in 1949 and after.