This isn’t my main genre these days so apologies if these are too out of date/excessively normcore.
On the TV side of things, the Ron Moore sci-fi duology is among my favorites - Deep Space Nine if you’re in the mood for something cuddlier and slower-burn, Galactica if you want the full-fat, reach-sometimes-exceeds-its-grasp thing (I know there are some divisive decisions including some that are objectively bad, but I will stand by Galactica to the end, including All Along the Watchtowers and the actual end. Though not what they did to Starbuck).
Book-wise, have you read Steven Brust? He also has a like an incomplete twenty-installment-long mega series, about a human assassin in a complex elven empire with a hard boiled vibe (actually just checked Wikipedia and book 16 of 19 is due out next year - better than I expected!) but there’s a completed prequel series that starts with The Phoenix Guards, and is a well-done fantasy Dumas pastiche - lots of fun.
Tad Williams I remember being good too - Memory, Sorrow, and Thorn is pretty straight doorstopper fantasy but executed well, and Otherland does kitchen-sink cyberpunk in a pacey way, with an appealing set of protagonists.
Raymond Feist’s main stuff I found to be subject to the law of diminishing returns quite early on, but the side-trilogy he co-write with Jenny Wurts (Daughter/Servant/Mistress of the Empire) was a fun bit of political fantasy. Might not have aged so well, though, as it is two white peoples writing about fantasy Japan.
Finally, this is maybe an out there recommendation given your preferences, but Hilary Mantel’s Thomas Cromwell series might sorta scratch the GoT itch? They’re historical fiction novels about Henry VIII’s fixer, who starts out dissolving monasteries, makes his bones helping Henry manage his annulment, then orchestrates the downfalls of Thomas More and Anne Boleyn before Henry inevitably turns on him (er, spoilers for history). It’s a complex, highly political story, but the characters are exceedingly well drawn - Cromwell is a marvel, sympathetic and idealistic in his way while still being ruthless - and the language is so so lovely. Plus it’s actually very very funny!