Mebbe you're taking that "King" thing a bit too seriously.
some of these are for clarification purposes:
Clapton solo albums suck. All of them. Carmen solo albums suck. All of them. Only their collabs were any good.
some of these have to do with periods:
Hall and Oates started off okay, but got way too full of themselves way too fast. They had, what? 10 albums? 15? Album one was excellent, album 2 was weird (Rundgren produced it) but had one brilliant song. Then - nothing. Pop stardom and complete suckage arrived at the same time.
Same deal with Kool and the Gang - kindo of a cool little funk band, then JT shows up and turns them into pop disco lightweights. They were great before. They sucked after. It was really a different band.
And some major suckage DOES have notable exceptions:
John Mayall, whatever his influence on the music world, sucked. Surrounded himself with great musicians, but couldn't hide his suckiness. In 40 years of recordings, ONE damn song was really good. He still sucks. He just had one good song.
Huey Lewis is evil. Just plain evil. Keeps recycxling old songs, sucks the life out of them, and gets adult contemporary airplay. But he came up with two songs that don't suck. HIS EVIL MUST BE DENOUNCED. but those two songs aren't too bad...
Daf