for me The Dark Tower ( the movie sucks ) by King is the best fantasy world i ever read by far, sadly for me its not a show yet
I watched the first two seassons of GoT and i did read the first book, but imo GoT got lost in so much politics, i was expecting a lot less politics and a lot more "fantastical" shit.
Its not a bad show, its just overated imo and The Witcher is a fantasy show that i liked way more than GoT.