Game of thrones is a story where nine different noble houses fight for the Iron Throne of Westeros, it has 8 seasons.
Outlander is a series about a world war 2 nurse who mysteriously goes back in time to Scotland in 1743, it has 7 seasons.
One of the most famous series of all time Lords Of The Rings which is a story of middle age’s earth powers and fantasies.
The witcher is an adventure and fantasy series of 3 seasons starring Henry Cavill is a story of a monster finding a place in earth for a survival.
Stranger Things is a horror fantasy series of 4 seasons in which a group of friends experienced supernatural forces and government exploitations.
The Sandman has only one season till now but has a great fantasy story where a girl with her supernatural power brings a monster with her imagination.
House of the dragons have two series in which the Targaryen house have a dispute in the family for the Iron Throne.