In no order...
The Sopranos
The X-Files
Firefly
The Expanse
BSG
Breaking Bad
Twin Peaks
Band of Brothers
Father Ted
The Boys
Game of Thrones would have made it in there, but for the last series of it. Deserves an honourable mention for being as good as anything I've ever watched up until a certain point and probably no other show, bar Breaking Bad and the X-Files, being as big as a pop cultural phenomenon as it as when it was in its stride.