indieradioguy said:
1970's KTAR
1980's KZZP
1990's KUKQ
2000's KFYI
This seems about the most accurate. Mind you, I wasn't alive for most of the 70s and didn't move to Phoenix until 1982--but KZZP was the perennial ratings juggernaut of the market. Between Johnny B and then Bruce Kelly... the 80s were basically KZZP's in terms of ratings and market buzz. Many would argue that KZZP's final two years or so (1990 and 1991) were run very slip-shot and constant format tweaks and adjustments to their positioners and on-air personalities turned off listeners, but I still think NCI ripped the station off the air far too abruptly. I believe Dave Ryan would have continued the reign over morning drive had he been given more of an opportunity--much as he has done with KDWB in Minneapolis basically ever since.
KUKQ... well it was around for only about half of the '90s, but I know plenty of people who listened to it at the high school I attended... pretty impressive for an AM station. I wasn't necessarily a fan, but appreciated it for the people that ran it and that it seemed relevant even though it was largely thought of as an underground station.
KTAR dominated news for many decades and until the very early part of the 2000 decade that was evident, but KFYI certainly turned that around and has been dominant ever since. KTAR never really evolved, or did so far too slowly. The landscape of news/talk was more about 'talk' than 'news' and that's been more and more apparent the last 20 years, the internet and 24-hour cable/satellite news channels have made radio news almost a dinosaur. KFYI realized that in 1985, KTAR realized it in about 2005.