speechalist
He (or she) who writes and/or performs speeches professionally - either for social or professional occasions (e.g. weddings, corporate events, political addresses, keynote speaking, live presentations etc)
“And tonight’s speechalist for this prestigious event is Harlen McRaney”
“That was a great speech, I bet it was written by a professional speechalist”
“That was a great speech, I bet it was written by a professional speechalist”