Wa alaykumusalaam wa rahmatullah, 1.) I can't think of any scholar or followers, but what I can recall is seeing a crown on the grave of Sayyiduna Ghawth-e-Azam Shaykh Abdul Qadir al-Jilani (radhi Allah anh). I believe it was gifted, not sure if it was during his lifetime or afterwards. 2. & 4.) Obviously not actual gold, just the color. As far as the "crown" being Islamic, aren't there numerous ahadith that mention the word "crown"? Like parents who will receive a crown on the Day of Judgment for their children acting upon and reciting al-Qur'anul Kareem. Also, the crown predates Christianity and has always been a sign of rulership. 3.) I don't see how this is undermining the status of the symbol of the Blessed Sandal. Can you explain what you mean here? From what I understand, the crown is in reference to the "crown of Shari'ah" (i.e. Taajush Shari'ah). And since Hazrat did not permit pictures or videos, the symbol is used as a replacement for his picture because it is something that everyone can understand. I don't see what other symbol could represent a crown or the Shari'ah, unless you have any ideas.
Assalamu alaykum, In the subcontinent and other regions where there are followers of Allama Mufti Akhtar Raza Khan rahimahullah, we see that they put up a symbol of a crown on posters, books, wall frames, and almost everything. There are places where people spend huge amounts of money to build large replicas of this crown. It has almost been elevated to the status of a taziya. However, no one seems to question its validity. Below are some points to ponder: 1. Has any scholar or his followers used such a symbol? 2. Is a golden crown even Islamic? 3. Does it not undermine the status of the symbol of the Blessed Sandal? 4. Some basic research suggests that the symbol used for the crown comes from a Christian belief of The Five Crowns. https://en.wikipedia.org/wiki/Five_...concept interpret,and the Crown of Exultation