Obviously one of our elite gang going north is going to die. Here is my opinions on who I think i will be/how likely each person is to die:
Jon - Least likely out of the bunch for obvious reasons. Basically 0 chance
Tormund - Fan favorite character which ups his chances of dying, however I don't see it as very likely.
Beric Dondarrion - IMO most likely character to die unfortunately. He MAY however just be brought back by Thoros or become a weird white walker like Benjen did
Thoros of Myr - Seems unlikely. He doesn't get a whole lot of screen time but he is one of those "mysterious" spell casters who can bring people back from the dead.
Jorah Mormont - Medium amount to die. They did just cure him from grayscale which would make it seem like he still has importance left to the plot, but that may just be in buying Jon and whoever else a chance to escape/capturing the white walker in exchange for his life.
The Hound - Considering I'm like 95% sure he is going to end up being Azhor Ahai I don't think he will die here.
Gendry - Second most likely to die unfortunately. I loved his bro moment with Jon when they were shit talking each others dads and each other. However he was just reintroduced after being missing for like 4 seasons and doesnt have much character development. Wouldn't be shocked to see him bite the dust.