perorator
/ˈpɛrɪˌɔːteɪtər, ˌpɛrɪəˈteɪtər/Definitions
1. noun
A person who imitates or pretends to be a sovereign or ruler, often in a humorous or satirical manner.
“The perorator took on the role of a king, complete with a fake crown and a lavish throne.”