According to the simplest logic. The more famous you are, the more powerful you are (of course it is a good name, not FRJJ or something like that.)
Li Dubai is well known in China. Women and children know this. Moreover, the civilization of the Tang Dynasty is often referred to by foreigners as ancient Chinese civilization. It can be seen that its influence is far-reaching.
Li Du is known as the Poet Immortal and Poet Saint. Su Lixin is not known as the Immortal of Ci.
But Li Bai's era was the most prosperous era. He could concentrate solely on writing poetry. (Although he was unhappy in officialdom). And Xin Qiji, Li Qingzhao. There is a lot of national hatred and family hatred in the poem.
Of course it depends on who you ask. If you ask a soldier which one is richer. He must like Song Ci. For example, Xin Qiji's "Broken Array". Su Shi's "The Great River Goes East".
But in terms of literary achievements. Or the Tang School you said is more awesome.