From a Sydney perspective, I’d probably say that different FM stations were iconic at different times of history. Perhaps something among these lines…
*Triple M (1980-92)
*2DayFM (1992-2000/01)
*Nova (2001-04)
*2DayFM (2005-13)
*KIIS 1065 (2014-15)
*Smooth 95.3 (2016-now)
Of course, Triple J and 2WS-FM/WSFM would also be recognised by many Sydneysiders. While it’s probably only the radio enthusiasts of this city who still remember Mix 106.5, Vega 95.3, Classic Rock 95.3 and Sydney’s 95.3!