I saw "The Red Wedding" long before I ever watched the show. Just happened to be i the room when my ex was watching that episode. But by the time I watched the show, I wasn't sure which of the characters got killed and wasn't really paying attention the the rest of the episode the first time I saw it, so it's not like I had any context or knew what lead up to the massacre.
I'm sometimes curious about the "GoT" books but will most likely never read them. But I caved on the show while the most recent season was being broadcast because everyone would just not shut up about it and I got tired of feeling like the only person not watching and also got concerned about it being spoiled (btw, though it was the most recent season everyone was raving about, it's actually the *previous* season that represents the show at it's peak). But anyway, I'm glad I watched it and yes, it's absolutely a "watch twice" kinda show. Planning on trying to watch it through again before the final season premiers.
Of the movies on your list, I've just seen "Black Panther", "Blackkklansman" and "The Fury" and I'd rank them in that order. TBH you can skip "The Fury" IMO. Pointless "Carrie" knockoff from De Palma just 2 years after the fact. "Panther" is one of the better Marvel movies I've seen but not the miracle people pretended it was. "Blackkklansman" was entertaining but awkwardly uncertain of its tone.
"Glass (when it comes out, even though I wasn't really a fan of either Unbreakable or Split)"
I thought "Unbreakable" was okay but inevitably disappointing after "The Sixth Sense" and mainly just really slow. And the whole water/swimming pool thing was really stupid. So I was engaged but even at the time sorta rolling my eyes. And I doubt it'd hold up well and I didn't bother w/ "Split" so I'll probably also pass on "Glass". I though "The Visit" was kinda fun (albeit also really stupid) though- see that one, Billygoat?
Always been morbidly curious about "Ishtar" myself but I have a feeling it's just really boring and unfunny. Lemme know though