Thats why i said those two cuz they're supposed to be good and ill try em sometime. And yes GOT the fantasy elements haven't always been in the forefront but they are there every season if not every episode. Dragons, whitewalkers, the red bitch with her magic, the other dude who resurrects his friend, the mountain being brought back, the undead army, the many face thing, etc. She became the mother of dragons i believe at the end of season 1 so it's always been there.
I havent read the witcher books tho and only know witchers fight monsters. I dont know what kinds monsters or how he fights em though so idk how itll look or how mainstream it'll be. LOTR was heavy in fantasy elements though and that was huge.