As someone who is nearing 60 and has followed the team since the early 70s, these are the only Flyers coaches I’d rate below Torts.
Bob McCammon
He played the same type of b.s. mind games though he wasn’t as arrogant and didn’t hide behind his assistants. However, he was also just a horrible coach
Wayne Cashman
A genuinely nice guy but in way over his head as an HC.
Terry Simpson
A disaster at every facet of coaching
Scott Gordon
The less said about Mimsy, the better
Alain Vigneault
Just as arrogant as Torts but minus the constant mind games with the players. Still, overall, a lousy coach.
That’s about it and you can make a case that McCammon and AV were merely just as bad rather than worse than the god emperor
He's probably on a tier with Hakstol, which is an upgrade over AV. Hakstol had an idea of how hockey should be played, and he was actually quite effective at getting everyone to play that way all the way until he was fired. Tortorella is the same. Tortorella's ideas are also limiting, but are probably less limiting. "The puck can move back and forth but not very much left and right" is a huge upgrade over "The puck can move backwards. Backwards. Backwards. The dmen shoot. THE DMEN." The Flyers have started to show creativity on entries beyond dump and chase, pure-north hockey too; we are seeing drop passes to set up give and goes or to let the original carrier create a little screen/pick. Hakstol didn't allow that.
So, on a tier with Hakstol, and probably better than Hakstol. Likewise Berube; another guy who had some ideas about how they should play, and was good at getting them to play that way. It was kind of a dumb and very limiting way to play, but the guy succeeded at getting them to do it. It was coherent. It was a system.
Dudes like you listed were just...what was the plan? What were they trying to do? Were they even trying? Stevens as well. Nice guy, good at cake. Pure pond hockey. No plan.