Not many.
Andrew Whitworth may be the best. Win the big game, then ride off into the sunset on your own terms.
Aaron Donald's end, though a shock for fans, was pretty good too. Choose your own time to hang it up after accomplishing everything one would want.
Most others, like Cooper Kupp, were let go due to some combination of age, wear and tear, and money before they were ready to end their careers.
It sucks, but... hopefully, much like guys like Eric Dickerson, Isaac Bruce, Torry Holt and others who didn't have that storybook ending, Cooper Kupp will finish out his career and then resume his role proud member and ambassador of the Rams' franchise.