As someone whos watched every single season of the wire,got,bb,and the sopranos 3x each (shiiiiit the wire at least 5 times each)
im going to safely say
Game of Thrones
Everything from the story,casting,acting,score,cinematography is top notch. Theres plenty of character developmemt (jamie,arya,the hound,theon,sansa,jon) and the plot is top fukking notch, yea the books gave them the outline + building blocks to play with but we all know by s2 they started straying off.
GOT also has the most blockbuster style episodes that have never been done on tv "baelor", "blackwater", "rains of castemere" etc. Then theres more levels to the greatness when you look at the production side of things, the sets and costumes, the fact that they shoot in 3 diffrent countries at the same time during filming,the cgi, the props etc
Season 6 and episodes 9 + 10 got everybody feeling like its the GOAT but with good reason, those 2 episodes combined couldve easily been a movie and in my opinion it was television at its finest, that was Afukking1 and i think its a guarantee that thrones is gonna clean house at that emmys and golden globes after that
The wire and every other show mentioned set the bar for quality TV but game of thrones took it to another level, sundays during GOT season have been feeling like movie night for a couple years already, im with the OP thrones got the #1 spot