Not really. First of all, I simply forgot about Tony Dungy. There was no intent there. However, the dominant years for the Steelers in that era were from 1972-1979...I said 80 because Super Bowl 14 was in '80, but I guess you should really say the 1979 season.
Now, another poster posted these parameters of an assistant coach that would be looked at for a head job:
Having a coaching tree means either 1. a coordinator has an innovative system that dominates the NFL 2. a coordinator helps a unit overachieve or elevates QB play or 3. a team is making deep playoff runs and the rest of the NFL wants to replicate that success.
Now, without question, from '72 to '79 you had all of those things to some level in Pittsburgh. Tom Moore comes to mind in the last two Super Bowl years. Bud Carson in the first two. George Perles. Moore never got a HC gig in the NFL. Neither did Perles. Carson got his chance, but not until 1990 with the Browns. Dungy wasn't a coach in their most dominant era, and in the event, he made his coaching chops the most in Minnesota with Dennis Green.
So in their most dominant era, Noll didn't have any NFL tree come out of that. The whole concept is overrated. Now, is Tomlin hiring the best assistants? Hell, no. But discussions on trees is a convoluted way to get to that. He just hasn't been making good hires.