I've heard people claim this for quite a few years but having lived through that period as an adult I am quite skeptical.
Who were the 'stacked' teams from the east?
The Knicks? They were the most significant rivals for quite a few years but who was their second best player (after Ewing)? Starks? Oakley? Mason? There was a very run of the mill supporting cast along side the one true star.
The Pacers? Yes, they surpassed the Knicks as that decade moved forward but who after Miller was really a difference maker? Smits? Jackson?
The Magic? Yes, they did briefly have Shaq and Penny and yes, they did actually knock the Bulls off one year, but that doesn't count (because any season that MJ didn't win a title gets disqualified). Additionally once that team started reaching an experience level where they could be a legitimate threat Shaq left for the Lakers. Penny's injuries didn't help matters any as the 94-95 season was really the last one where he wasn't at a minimum somewhat limited.
Pacers had Miller, Smits, Derrick McKey, Mark Jackson, the Davis Boys. Later on they added guys like Mullin, Travis Best, Jalen Rose. Pistons early 90's Isiah, Dumars, Laimbeer, Rodman, Aguirre, Vinnie Johnson, James Edwards. Celtics early 90's Bird, McHale, Reggie Lewis, Parish. Cavs Mark Price, Daugherty, Nance. Those Knicks teams didn't have star power after Ewing but they were deep, physical, and played great defense. Starks, Mason, Oakley, Charles Smith, Derrick Harper, Ro Blackman. The later Knicks teams with Ewing, Oakley, Starks, Larry Johnson, Allan Houston. The Heat with Hardaway, Mourning, Mashburn.