The Archangel Gabriel is the patron of:
Argentinian ambassadors
broadcasters
clergy
communications workers
diplomats
messengers
philatelists
Portugal
post offices
postal services
postal workers
radio
radio workers
Seattle, Washington, archdiocese of
secular clergy
stamp collectors
telecommunications workers
telegraphs
telephones
television
television workers
The patron saint of messengers is St. Gabriel the Archangel.
St. Gabriel the Archangel is the patron saint of postal workers.
Gabriel the Archangel is the patron saint of broadcasters as per the Patron Saint Index.
There are at least two saints that fit that patronage - St. Gabriel the Archangel and St. Expeditis. Yes, there is a Saint Expeditis. Really!
Yes, St. Michael is the patron saint of mariners and sailors.
St. Michael the Archangel is the patron saint of emergency medical technicians.
Yes, St. Michael the Archangel is a patron saint of artists.
St. Michael the Archangel is a patron saint of sailors.
There are no patron saints of 911 dispatchers but St. Michael the Archangel is the patron saint of emergency medical technicians and other emergency workers. He would probably be willing to accept prayers from dispatchers as well.
Gabriel is an archangel and was created by God as a saint.
There is no patron saint of ambassadors except in Argentina where St. Gabriel is considered as the patron of THEIR ambassadors.
The patron saints of police officers are St. Michael the Archangel and St. Sebastian.