Ghostrider0002
wives for jon: cercei or myrcella (don't know how old she is in this fic), dacey mormont, a velaryon. As lovers, you can make them one for each kingdom that is missing. To improve the relationship with the north, I suggest, as you say, the union of Vicerys and Sansa Robb with some Dayne that should improve the relationship between kingdoms, also some way to improve the queen's gift of more crops.