I think Reb Chaim Dovid Zweibel should be appointed to the position once held by Reb Moshe Sherer in Agudas Yisroel.
After Rabbi Sherer was niftar the Novominsker Rebbe did double duty as an already existing member of the Moetzes to also take on Rabbi Sherer’s duties. That’s how the Rebbe assumed the title of Rosh Agudas Yisroel. The “rosh” referred to the lay leadership of Agudah, not of the Moetzes (where all members are on equal footing.)
Now that we lost both Rabbi Sherer and the Novominsker Rebbe, we should go back to the original system where the lay leadership was a separate position.