Indeed! I had noticed that all those names sounded very familiar.
For readers not familiar with Dangerous Dan Snyder, the widely despised Washington team owner, he has gone through many coaches, assistants, and quarterbacks during the ruinous years he's owned the team 1999-20. All those now elite head coaches you mentioned above, had spent some miserable years in Washington. Well-known players, including some All-Pros, quite literally asked to be traded away rather than play for Washington.
Here's a long list of 9 head coaches over 21 years of Dysfunctional Dan Snyder. It was painful to look them all up. (The assistants and QBs are too numerous to list.)
Norv Turner – 1999-2000 (fired in mid-season)
Terry Robiskie – interim
Marty Schottenheimer – 2001 (Dared Snyder to fire him after 1 season. He had a longer contract, so he was paid for years afterwards.)
Steve Spurrier – 2002-03 (fired after 2 seasons)
Joe Gibbs – 2004-07 (Gibbs quit before Snyder could fire him)
Jim Zorn – 2008-09 (fired after 2 seasons)
Mike Shannahan – 2010-13 (Kyle was Offensive Coordinator.)
Jay Gruden – 2014-19 (fired mid-season)
Ron Rivera – 2020 to present (I wish Rivera well, but he should have his head examined.)
I know for sure that Marty Schottenheimer and Mike Shannahan have warned others not to work for that SOB. Others may have done so as well, but less publicly.
If you're a long suffering Washington fan, like I am, why not spell the name that fits the true nature of the owner – Washington Team Football – WTF?! [\RANT OVER]
Back to the 2022 play offs. It was a pleasure to watch some good football, not WTF and not any other NFL East team.