Here in Vermilion, OH most of the time it is a varying signal from WMUZ/Detroit, MI with a Christian format. I have also caught CIDC/Orangeville, OH with a CHR format as well as WNND/Pickerington, OH with a 'Rewind' classic hits format.
You keep picking my locals LOL! All WIMZ, all the time in Knoxville and I've never caught them off
Back in Dayton and vicinity it was a little more interesting. WGRR Cincinnati most of the time, better in the south suburbs. Go east and WNND is a possibility. With really good tropo, WMUZ has been known to come in
A few years ago making a drive between Columbus and Springfield, I made sure to monitor the 103.5 frequency. I remember WNND holding its own until just past the Madison-Clark County line, which coincidentally is the line between the Columbus and Dayton DMAs. WGRR took over just east of Springfield, but for a few miles it was quite a battle.
(Incidentally, I am pretty sure WNND's tower had moved to its current location by then, as opposed to where it used to be closer to Baltimore, Ohio, maybe seven miles east-southeast of the current tower.)
Luckily for anyone who wants to hear WNND programming, the "Rewind" format is simulcast on 104.3, which comes in pretty well out to our west.