The “Royal Assassin”, “Tawny Man”, and “The Fool & The Fitz” trilogies by Robin Hobb.
Some of the best-written high fantasy I have EVER come across.
I’d go with the Liveship books myself, if I were looking for a property to make into a TV series. I like the off-the-beaten path setting and the fact that not all of the characters are suffering angstmuffins. :) Admittedly, the sea serpents might be tough, but that’s why we have CGI.