I'll probably try one of the Anglo-Norman dynasties first, perhaps Salisbury. Especially if they can actually become kings of England, as the second-most recent screenshot seems to imply.
After that, I think one of the families in the HRE. A game as the counts of Provence or Toulouse, trying to resist the increasingly powerful king would be interesting as well.
After that, I think one of the families in the HRE. A game as the counts of Provence or Toulouse, trying to resist the increasingly powerful king would be interesting as well.