Yeah, but the three cornerstones of that defense were Noll guys. Woodson, Lake, and Lloyd. Those are elite players there. Add Dirt to that group, and there is not a single player that BC brought in during his first run of playoff teams, via the draft, or undrafted, that I would take over any of those four, and that includes Kirkland, who was Cowher's best draftee, until BC began hitting home runs in the late 90's.
That is a strong core of guys that were in their primes when Cowher took over. Green was a very good tight end, and Foster was an elite back, but Cowher was just as stupid with him as Tomlin was with Willie Parker, and he was ruined after carrying the ball an idiotic 390 times in 1992. Hardy Nickerson was another good young player that Cowher inherited. Unfortunately, he didn't stick around. Cowher did a good job of filling the gaps with solid players, but of course neglected the most important position on the team. When Noll's guys got old, the team declined.