WLS-FM wasn’t really rock leaning until fairly recently, around the time WLUP flipped. WLS-FM has a lot of competition and WRME has hurt them 6+, WLS-FM does still play the likes of Cyndi Lauper, Belinda Carlisle, Madonna, etc. WLS-FM, but much more so WJJK in Indianapolis are the best examples of classic hits that are still mainstream in the contemporary sense but lean rock.
I’m probably going to get crap for this, but I’m not a huge fan of how Audacy’s classic hits stations sound. Like I said in the WOGL thread, a lot of them have quit using jingles and all share a very similar playlist and have a very dry sound. I would say KRTH is one of the more rock friendly classic hits stations in their stable. WIAD is pretty much in the middle and is similar to KOOL-FM, the new WOGL, or KLUV. I can’t really say 94.7 is rock friendly when they play plenty of Whitney Houston’s catalog and the likes of “What is Love” and “Here Comes the Heart Stepper.”
Actually, iHeart’s classic hits stations sound pretty damn good. They’re generally very well balanced, more upbeat in presentation, and vary more from market to market as long as it’s a top 50 market. The playlists have way more variety than a lot of their Audacy counterparts.