This reminds me that Myrtle Beach SC is missing several formats.
One oldies station has some, but not all the songs found in easy listening, standards and classic-leaning urban AC. And if any of those songs are not on that station you're out of luck. Soft AC evolved into mainstream and quite a few songs were lost, possibly not heard on any other stations. The one classic hits station is 80s-based.
No Hot AC but one of the CHRs seems to lean adult.
Active rock fans must jump between "classic rock that really rocks" and an alternative station that doesn't really rock but occasionally plays grunge-type music.
Urban AC can be found on distant stations if you're lucky, but in two of the three cases an adjacent frequency would block the signal in much of the market. The other station, more oldies based, reduced its signal, and there is a translator in one location on the exact frequency. Other than that, R&B is either hip hop leaning or very old with white DJs.
At least classic country is on AM and a translator.