Then you really should look at those Bull rosters from the 1990s. Paxson, Harper, Kerr to name a few. They had a competitive team and actually signed some key free agents.
There are very few owners in all of sports that have really changed a team. The majority of the time nothing really changes. The Sox hadn't been in the playoffs in over 20 years when JR bought the team. They made it a couple years later.