Who can intercede?

From a forthcoming SBL book, Is There a Wisdom Tradition? New Prospects in Israelite Wisdom Studies, chapter 10, "How Wisdom Texts Became Part of the Canon of the Hebrew Bible" by Raik Heckl:

The pious sufferer who keeps his relationship with God in spite of his suffering is alone able to perform the intercession that Eli thinks to be impossible [I Sam 2:25]. The characterization of Job follows the manner of Eli as well as of Samuel. But Job outrivals not only Eli but also Samuel, if we take the later development of the Samuel story (1 Sam 8) into account. The pious sufferer alone is able to intercede effectively for others to God.