I'll add Dave Johnson from 1989-90 to the mix. Even if Johnson was slightly below average going by ERA+, he was miles better in that 1.5 year stretch, than the rest of his career when he was absolutely hammered. Plus, I always admired how he gutted out an emergency start against the Blue Jays the final weekend of 1989 season after Pete Harnisch got scratched because he stepped on a nail.
It really does get to the point where some know they've come full circle.
You know, for quite a while now, every time I passed a cemetery,
I felt as if I were apartment hunting.---Prof Wutheridge from The Bishop's Wife (1946)
But that is not the way business work since they shifted from producing a popular product at a lower price than what it is sold for and finding a profit margin that can support R and D for future products.
Somewhere it became known that public businesses had to have gains each quarter to keep the stockholders content.
Staying the same at any point is failure in that later model.