Demetrios1453
Legend
Purple Dragon Knight, Sun Soul, Long Death are FR specific.
That leaves Swashbuckler, Mastermind, Undying, Oath of the Crown, Storm, Arcana to pick from, does anyone know which four were most popular (Swashbuckler I already know).
"Banneret serves as the generic name for this archetype if you use it in other campaign settings or to model warlords other than Purple Dragon knights." - the text of the book itself shows how the Purple Dragon knight can be non-setting-specific. And although it doesn't immediately say so, the monastic traditions could instantly be reskinned for other campaign settings by using those settings' deities of light and darkness. Granted, I don't see these three as first choices if you're only going to bring over four of the archetypes...
I'm beginning to think the Undying pact Warlock will be the fourth, as that will have utility in other settings, especially Eberron.