well, in the olden days the wore them
King Oscar II of Sweden and Norway in the Crown of Eric XIV, the main symbol of the Swedish king.
Malaysian King Abdul Halim Adzam V
King George V
Charles at his investiture at Caernarvon Castle with his mother, Queen Elizabeth
Ghana's Ashanti crown jewels stolen in Norway hotel
"Rajas" (kings) who frequently wear white robes and golden crowns, here Maharishi Adhiraj Rajaraam
Nyimi Kok Mabiintsh III – King of Kuba (D.R. Congo)
Oseadeeyo Addo Dankwa III – King of Akropong-Akuapem (Ghana)
and my favourite.......
although he looks hotter without a crown