Not really on-topic for the I Spy board, but I'd drop "Survivor" and "American Idol" from the list (Both are just spawn of "The Real World," slightly different flavors of "Reality Television" -- a name as antithetical to its subject as "PATRIOT Act.") In their place, I'd have to list Dragnet and Star Trek.
Dragnet revolutionized the cop show, its return in 1969 spawned Adam 12 and Emergency!, and those three together introduced us to the concept of Policemen and Firemen and other "heroic" roles in our society being jobs held down by ordinary folks not really all that unlike ourselves. This was Jack Webb's contribution to Television, and without it, there's no "Hawaii 50," no "Kojack," no "Streets of San Francisco," "The Rookies," "The Mod Squad," all those cop shows with the almost cozy "Home" setting of an office and bosses and co-workers and camaraderie. (Without which, "Hill Street Blues," which took those nice, clean workplace settings and dirtied them up and mussed their hair, would have been impossible.)
Star Trek, of course, was and remains a phenomenon that holds a dominant place in Television and in entertainment history. You can't make a Science Fiction without concerning yourself with the looming presence of Star Trek in the popular imagination; people in present-day situations say "Beam me up, Scotty," and everybody gets it. More than this, though, Star Trekinvented the building of strong ties between a program and its viewers, taking the existing phenomenon of "fandom" and adapting it into something that encouraged audiences to exercise real power in a way they never had before. Gene ROddenberry, Star Trek's creator, played a strong, deliberate role in the cultivation and empowerment of "Trekkies," as the fans were then universally known, encouraging them to tell NBC what they thought of plans to cancel the series. Relationships between TV and its viewers were never the same after that.
Also, honestly, there should be places on that list for M*A*S*H and Wiseguy, the former for obvious reasons, the latter for introducing "arc-based" storytelling to episodic television. But I'm not sure what I'd can from the list to make room for them.