Question about Chicago (the band)

In which I rank their top forty singles, most of which reek.

this band’s unstoppable 20 year run of success morbidly fascinates me... first three albums all doubles of eclectic pop/jazz/r&b/latin styles. followed by a goddam quadruple live album recorded at Carnegie Hall... followed by a steady move to straight MOR (slight return to more “ambitious” extended jazzy stuff with 1974’s VII)..and a absolute blockbuster in 1976. 2 years later, key member accidentally kills himself pointing thought-to-be-unloaded gun at his head at party. Band continues on and slumps chartwise for a couple albums but keeps on rolling with 80s MOR tide and comes back to rule the adult contemporary charts for 2/3rds of the decade? So many albums. I don’t really like their music, kinda hate James Pankow’s arrangements/horn sound on the earlier stuff + cant really stand Peter cetera’s “thing”.. idk any thoughts on Chicago?

Fun fact: in the late '60s they were in residence at an LA club. One day they took in a Dodgers game, and a couple of people took exception to these goddamn longhairs, and beat them up, fracturing Cetera's jaw. He had to have his jaw wired shut, but they also still had to complete their residency, so he just sang with his mouth mostly closed, and ultimately kept singing that way after his jaw healed.

is this Bill Champlin, formerly of Chicago, in the Skyrizi ad? it sounds like him, and when I searched, I found a bunch of people who suspect but not confirmed outright.

https://www.youtube.com/watch?v=_k8u2TqW3es