I think there's too many professions out there to take a decent census with, unfortunately. I was surprised to not see military/police entities on the list?
Main: Maelstrom [Limsa Lominsa (Coral Tower), Moraby Bay, the Mist, Vesper Bay]
Alt 1: Chef [the Markets of any city-state]
Alt 2: Pirate, Treasure Hunter, Explorer [Limsa Lominsa (Docks), Aleport]
Alt 3: Yellowjacket, Medic, Tinkerer [Limsa Lominsa (Coral Tower), Mist)
Alt 4: Trader, Grocer, retired revolutionary [Revenant's Toll, Ul'dah (Quicksand, Sapphire Ave)]
Alt 5: Maelstrom [Limsa Lominsa (Coral Tower, Docks), Moraby Bay, the Mist]
Alt 6: Brass Blade, former Sultansworn [Ul'dah]
Alt 7: Adventurer, Retainer [Ul'dah (Quicksand), Limsa (Wench), Gridania (Carline)]
Edited with locations for you~
Main: Maelstrom [Limsa Lominsa (Coral Tower), Moraby Bay, the Mist, Vesper Bay]
Alt 1: Chef [the Markets of any city-state]
Alt 2: Pirate, Treasure Hunter, Explorer [Limsa Lominsa (Docks), Aleport]
Alt 3: Yellowjacket, Medic, Tinkerer [Limsa Lominsa (Coral Tower), Mist)
Alt 4: Trader, Grocer, retired revolutionary [Revenant's Toll, Ul'dah (Quicksand, Sapphire Ave)]
Alt 5: Maelstrom [Limsa Lominsa (Coral Tower, Docks), Moraby Bay, the Mist]
Alt 6: Brass Blade, former Sultansworn [Ul'dah]
Alt 7: Adventurer, Retainer [Ul'dah (Quicksand), Limsa (Wench), Gridania (Carline)]
Edited with locations for you~