Are the Twelve Imams, with the exception of Ali, Hassan, and Hussein, may Allah be pleased with them, considered among the Ahlus Sunnah, and is it permissible for the Ahlus Sunnah to use titles such as "Al-Baqir" and "As-Sadiq" for them?

The Twelve Imams, according to the Shia, are in reality imams and scholars from the Sunni tradition. Starting with Ali and his two sons, Hasan (definition) and Husayn—may Allah be pleased with them—and continuing through Ali ibn al-Husayn Zayn al-Abidin, Muhammad al-Baqir, Ja'far al-Sadiq, Musa al-Kazim, and Ali al-Rida, all of these are known imams of guidance and Sunnah (definition). As for their sons: Muhammad al-Jawad, Ali al-Hadi, and Hasan al-Askari, they are likewise, even if of lesser rank. However, the existence of Muhammad al-Mahdi al-Muntazar (the awaited Mahdi) is not proven. Al-Dhahabi pointed out that these imams were virtuous and knowledgeable and suitable for the caliphate, while Shaykh al-Islam Ibn Taymiyyah stated that whoever follows what has been authentically transmitted from the Prophet, peace and blessings be upon him, and his caliphs and the imams of his household, will find agreement in the fundamentals of their religion and their laws, which will suffice them from the innovations introduced by later generations.