Pro sports teams where the coaching staffs had a split locus of control (e.g. mid-1980s Chicago Bears)

Not recent memory...

But I do think Jim Lee Howell was a great coach that should be in the Hall of Fame. He had perhaps the greatest coaching staff in the history of the NFL in Lombardi and Landry. Landry played for Howell as a player as well as playing for Howell's predecessor and HoFer Steve Owen where he learned to be a great coach, but it was Howell that got Landry to complete the transition from player to coach.

Howell was still pretty successful even after both left.

Howell was awesome but also a super rare breed of a coach, not sure anything like that will ever happen again.
Right. I don't know much about the 1954-1960 NY Giants, but if you have to go back 65 years then it's really not a thing that happens. More of an anomaly from the past.