These were not one hit wonders. But they are missing. It is a 6 hour span, it is glaring they do not show up even, once. Furthermore the format is moving toward the end of the decade which most of those artists are from due to the audience aging out of the 54 age group.

Milli Vanilli
Rick Astley
Debbie Gibson
Rick Springfield
Lionel Richie (5 #1 and 21 weeks spent @ #1)
Stevie Wonder (4 #1 and 15 weeks @ #1)
The Bangles
Gloria Estefan & Miami Sound Machine
Huey Lewis
Lisa Lisa & Cult Jam
Pet Shop Boys

Yet, notice the boner over rock based White artists being played more often?

Rod Stewart
Aerosmith
Elton John (2x within 1 hour and 40 min)
Survivor (same song within 6 hours)
Pat Benatar
Eurythmics

WLS-FM is feeding you the same ol songs, over and over, mostly by the same artists. It is a really outdated notion that White PDs and MDs will swear by due to research (for the record I am White, I am not closed minded as they are). It is not wise to put one hit wonders or novelty songs in High rotation, but for cripes sake.... stand out a little bit, make people say OH WOW! There will be a good chunk of artists and songs to be skipped over and when they move into the 90s, the excuse will be "they did not test well". The biggest BS excuse. They are not even trying to cover it up or to make up for it with specialty programming. What specialty programming is WLS-FM airing? Classic American Top40 countdowns? (no) Alternative shows like WXXY The 80s Channel ran the "Deep End"? (no) Freestyle/House/Dance which Todd rode hard @ his previous gig on B96? (no). Rock/AOR/Hair show? (no)..... I give up. Radio doesn't care, nor do listeners outside of us geeks here.

Z