Funny how our personal cultural history goes. Norman Lear was a dam buster in many ways. Although Archie Bunker was a take on a British sit com of the times- "Till Death Do Us Part" I think it was, he did open a lot of eyes. Sex, war, racism, gay issues etc. I did not care much for most of he spin offs- MAUDE being a major exception.
And, MTM reinvented American TV. Brilliant.
Some would say that those were the "golden age" of US television. I do not know. I was addicted to I Love Lucy.
I also remember when my mother bought a separate TV for me so we could watch the Judy Garland Show whilst nasty stepfather and half brother watched Bonanza.
Carol Burnett, Sonny & Cher, Gary Moore, etc. Noe have "stars" using the term extremely loosely, and somewhat talented amateurs auditioning in front of the American public. Every country has those now, I think. Britain pulled the button with "Britain's Got Talent" That was dreadful. We got it here as well, thanks to Simon Cowell.