If you're thinking of using masters as the icons for the King, Queen and Jack, maybe use the original three masters from the first books?
Guild - Justice, Sonnia, Perdita
Arcanist - Marcus, Rasputina, Ramos
Resurrectionist - Seamus, McMourning, Nicoderm
Neverborn - Pandora, Zorida, Lilith
That'd keep with the old timey theme I'd imagine, considering they are the original masters.