@Ilsabet
for me I've played with guilds that have a "No Chosen One" policy - which makes sense in that context - can't have everyone be the hero
I only really play the story with 1-3 characters out of my 8 so far.
So what I like is to imagine them all with different backgrounds that happen to meet
So the four first classes met during the base game and an character they met after came during each chapter