Wang Xizhi's best calligraphy, which is also admired by everyone, is running script, so running script should be the first promotion of Wang Xizhi.
And if anyone writes the most arrogant calligraphy, it must be cursive. Zhang Xu, known as the sage of grass, can't be turned away.
As for regular script, it's Liu Gongquan's turn and Yan Zhenqing's turn to have model textbooks. The orthodox way of calligraphy is also the way of regular script. All the documents handed down in history are attributed to regular script. At that time, those inscriptions, documents and historical records were written in regular script. That's why we admire regular script so much.
To sum up, the four most famous calligraphers in China history should be Wang Xizhi, Zhang Xu, Liu Gongquan and Yan Zhenqing.