Bshtei: Rav Aharon Leib zt’l is also no longer with us, just like Rav Shmuel zt’l. Your listing of the “primary mesorah” is very far from universally agreed. Many others would place Rav Shmuel after his father, Rav Shach and Rav Elyashiv. Indeed, Rav Elyashiv himself held shittos in line with Rav Shmuel more than Rav Aharon Leib.
And it isn’t just Brisk and Satmar that holds of the same shittos as Rav Shmuel. It is many of the Litvishe Gedolim in Eretz Yisroel and America, including Rav Malkiel, Rav Ahron Feldman, Rav Ahron Schechter, Rav Yosef Harari-Raful, Rav Yaakov Horowitz (Telz), The Vialipole, Rav Wachtfogel, etc.
And despite your misconception, Klal Yisroel does not use the Yated as a guide to who is correct and consider other media outlets as incorrect.