Magni for sure. Khadgar I think still leans closer to the Alliance but because of Dalaran he has to try to stay neutral. I do think he's more willing to work with Horde than most in the Alliance though, especially when it calls for it. He's kinda like Jaina when Jaina was bet buds with Thrall. She was Alliance but wanted there to be peace and everyone to work together.
I think Alleria & Turalyon will probably return to the Alliance. Probably as leaders to the Void Elves & Lightforged Draenei.
I don't want to see Genn die. That said, Lord Darius Crowley is a fucking G.
What Worgen wouldn't want this guy as their leader?