I made it so Hadvar and Ralof are added to the necessary follower factions after you win the war on the side of the imperials or stormcloaks respectively.

I also added spliced/reused Dialogue for Hadvar so he can react to all the necessary follower dialogue.

Currently requires Missing Follower Dialogue Edit as I used scripts from it to get Hadvar's follower Dialogue working properly, I may look into making this mod not require any other mod in the future.

May also look into making them marriage candidates, though that seems harder to find good dialogue by Hadvar for.

credit to AndrealphusVIII for Missing Follower Dialogue Edit