The Dark Tower by Stephen King..
It could be done just as epically as GoT. If in the right hands...
Ever since I first started watching GoT I couldn’t help but think how awesome a faithful & hard “R” adaptation of Stephen King’s
“The Dark Tower” series could be..
If done on-par with how Thrones seasons 1-4 were done. Plus, the writers would at least always have the novels to take from - since King actually finished his 7 Book series.