In game of thrones i felt that the Starks received way too much hardships and tragedy. i know that there were vital points of story, and there were times these hardships were building points for their characters, but i feel when every member of a family has been either killed, raped or crippled then they deserve a break. 

In my story that break comes in the form of a powerful hunter/general from another world. 

I have no intention of altering the story to save every stark, or have them win every time, and some of my favourite characters may even be victims of this plot change as well. 

edited

The main character, and there will be several new characters introduced to the storyline, will not just be some over powered guy who makes outrageous decisions that always work out (cough Plot armour) but will be someone that treats the world as a real world and has fears, doubts and is cautious in his decisions. He is susceptible to changing his mind and character traits depending on his experiences in this life. 

The story will primarily follow the plot at the beginning with some minor changes, and as more things change they will increase till the entire story is changed at the end. 

I am not copying the world of GoT exactly. cultures, politics and nobility may be changed or made up.