Semi-serious answer. Greeks like Homer and Euripades and Virgil, the bible, Shakespeare. Lots of Western pop culture is a rehash of old stuff.
Answering the question more as you likely intended. Pokemon. Harry Potter. Star Wars. The MCU.
From what I suspect is due to my personal bubble, Star Trek; ST pops up several times per week in my life. And Twilight, I’ve got a group of friends who are queer and will jam a Team Alice or KStew reference in at every opportunity. It seems like the rest of the world has moved on from Twilight love and Twilight hate, but this group is keeping the discourse alive.