This is my first post. Be gentle.
Some (crackpot?) thoughts on how the story will end involving who sits the iron throne as well as the small council who help them rule (with brief explanations):
King and Queen: Jon and Dany (Assuming RLJ is true, ice and fire, both have experience commanding/ruling and are still continuing to learn)
Hand of the King: Tyrion - He's done it before and did a pretty good job. He's already become a "friend" to Jon and soon to be Dany maybe? According to his aunt, he is Tywin's son more than Jamie) I'm not completely sold on this one but I also believe that Tyrion is the 3rd head of the dragon (totally different topic)
Master of Coin: Can't decide who fits here. Tyrion if someone else is hand. Maybe Sansa who learns from Littlefinger?
Master of Laws: Stannis (He is the definition of justice. Will acknowledge that Jon and Dany's claim is stronger than his. He had the strongest claim in the war of the 5 kings, but Jon and Dany's claim can be traced back throughout the history of the 7 kingdoms. Robert was a usurper. Stannis acknowledges that Jon and Dany will make good rulers and one of them is the true Azor Ahai)
Master of Whisperers: Bran (thanks to being educated by Bloodraven, he won't need whispers. He will have eyes everywhere)
Master of Ships: Davos (cuz he's the man)
Grandmaester: Sam (will gain all sorts of knowledge at the citadel and will be instrumental in defeating the others. Also Jon's best friend, not too far-fetched).
Lord Commander of the Kingsguard: Brienne (Its basically her dream come true. I think Jamie and Cersei are going to die, probably together. Don't really have much to go on here) Could also be Barristan (makes more sense except for him being old).
Just for fun, King's Justice/Master Assassin: "No one"
Let me know what you guys think. You could make the argument that this is all too "obvious." Yes, I based it on most of the main POV characters winning in the end. POV characters aren't always safe. However, Ned is the only major POV character to die (Cat comes back, although not POV). Other POVs that have died are Quentyn and Arys Oakheart, and prologue/epilogue characters unless I'm missing someone. I think killing Ned early was to make readers understand that "no one is safe." As George has stated, (paraphrasing) he wants the readers to be scared when the characters are in danger rather than knowing they will win in the end like Spiderman or Batman. I'd say it worked. We will always fear for our favorite characters, but that doesn't necessarily mean the good guys can't win. On the contrary, it gives us the expectation that they won't. "If you think this story has a happy ending, then you haven't been paying attention." So the good guys winning in the end could be as much of a surprise as it is "obvious." Although this may be "boring," there are still plenty of details and events leading up to this conclusion in the next 2 books to make the story surprising. Was anyone upset about the good guys winning in the Lord of the Rings?
Notice: I'm not even calling this a "theory," mostly because I don't actually believe it myself. These are just thoughts (I know I'm not the first/only person to have them) which stem from me thinking Bran is the ideal master of whisperers, Sam is the ideal grandmaester, and Davos would be perfect for master of ships (you could make a case for Victarion but I think Stannis/Davos joining Jon is more likely). I just plugged major POV characters into the other positions.
Obviously, I have very little evidence supporting these thoughts. I've only read through the books once and browsed this forum a bit. I just thought it would be fun to discuss. I'd be happy to hear your thoughts or who you think would be the ideal small council at the end of the series (Assuming the iron throne and small council remain in tact). I like parentheses.