Peeps; The thread asked for THE BEST. -Not you're fucking favorites.
Then by that measure we're looking at Meet the Press (longest running), The Super Bowl (highest % year over year of watchers) or some other similar measure going to Friends, Law & Order, The Simpsons, etc.
But that'd just be boring.
I think we all interpreted the OP's question like this:
The Guardian's top 50 television dramas of all time | Television & radio | The Guardian