Who is Included in Ahl al-Bayt?

Imam Fakhr al-Dīn al-Rāzī رَحْمَةُ الـلّٰـهِ عَـلَيْه states under the abovementioned verse:

There are different opinions regarding who Ahl al-Bayt are. It is more appropriate to say that all the offspring of the beloved Prophet صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم and his pure spouses are Ahl al-Bayt. Imam Ḥasan, Imam Ḥusayn, and Sayyidunā ꜤAlī رَضِیَ اللهُ عَنْهُم, are also included among them.^[1]

Sayyids will not enter Hell اِنْ شَــآءَالـلّٰـه

Dear Islamic brothers! It should be remembered here that Ahl al-Bayt are maḥfūẓ (protected) from sins, but they are not maꜤṣūm (infallible), because only Prophets and angels عَلَيْهِمُ السَّلَام are maꜤṣūm.

Maḥfūẓ (protected) means that it is possible for them to commit sins, but Allah Almighty saves them from sins, whereas maꜤṣūm means those personalities for whom it is impossible to commit sins.

Furthermore, it should also be remembered that among the Sayyids, the high-ranking saintly personalities, such as Sayyidah Fāṭimah al-Zahrāˈ رَضِیَ اللهُ عَنْهَا, Imam Ḥasan and Imam Ḥusaynرَضِیَ اللهُ عَنْهُمَ , as well as Sheikh ꜤAbd al-Qādir al-Jīlānī, Dātā Ganj Bakhsh ꜤAlī al-Hujwayrīرَحِمَهُمَا الـلّٰـهُ  etc., are protected from sins.

Other Sayyids, if they fall into sin, thenاِنْ شَــآءَالـلّٰـه     ! By the blessing of the beloved Prophet صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم, they will not be held accountable for their sins. Accordingly, listen to two blessed sayings of the devotee of the Companions and Ahl al-Bayt, Imam Aḥmad Razā Khān رَحْمَةُ الـلّٰـهِ عَـلَيْه in this regard!

(1): "Every Sayyid of true lineage (i.e., that Sayyid who is truly, in Allah's knowledge, from the offspring of al-Ḥasanayn al-Karīmayn), is a part of the pure body of the Prophet صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم, and no part of the pure body