Yeah, I guess Xiahou Yuan did have more than enough talent. Cao Xiu, Cao Hong, Zhang He, and Guo Huai all served him there and that's quite a powerhouse team. Liu Bei came personally, I think, bringing Fa Zheng, Zhang Fei, Yan Yan, Zhao Yun, Huang Zhong and Ma Chao. On paper, bot sides are excellent. As said before, Hanzhong was hard to defend when the opponent was attacking from Yi. Xiahou Yuan did do well, for about a year when Shu came to attack, but eventually, he just lost to many men. Was Han River taken after his death or before? I remember reading that once the river was taken, then Cao Cao had no choice but to retreat.
I've a brave warrior in my army. Shen Ai is his name, and he can slay this Hua Xiong.
Wei has no more famous commanders, Shen Ai takes lead of the vanguard!
Even a commoner on the street knows what Shen Ai is thinking!