Bran waiting to have Sam tell Jon about his parentage until the moment Sam turns against Dani. I think he may be playing a long game to put Jon on the throne as well.
If all the Starks survive they'll be a scary bunch. Sansa has probably surpassed Tyrion at playing the game at this point. Bran can see threats before they develop, and with Sansa telling him who to look at he'd be especially effective, and Arya is now the ultimate assassin who can dispatch anyone Bran and Sansa see as dangerous.
The only characters I am confident won't die are Jon and Tyrion. Tyrion because he's the writer's pet and Jon because they are not going to kill him twice. Sansa may end up being too focused on the game. Bran and Arya have important parts to play with their powers, but those parts may end with sacrifice. Dani is not making it out alive. Pretty much every character more minor than them is on the chopping bloc, and Varys' death was prophesied last season.