I took out your Frank Knight bit because it was only about him translating Weber, not about Weber's influence on his thought. If you find reliable sources to cite Knight being influenced by Weber, that information is appropriate for, say, the Legacy section. However, I would ask that this kind of expansion be saved for after the GA process. 
A general note: if mainstream thought today puts Weber in the sociology box, then that is the article's main stance. Wikipedia ideally mirrors mainstream thought. We also make note of significant minor viewopoints, observing the proper weight of those viewpoints in relation to the mainstream. There is certainly room in the article to describe Weber's influence in economics.