Which running script is better in modern hard pen calligraphy? Where is Wang? Where is Jing? Tian Yingzhang? Wu Yusheng?

The hard pen running scripts you mentioned are all good, with different styles and strengths. Wang is fluent and free and easy (similar style). Jing is similar in style and belongs to a dignified and beautiful running script. Wu Yusheng's should belong to the running script, which is strong and has the flavor of Yan Gu.