The current Manchester City boss guided Bayern to three consecutive Bundesliga titles but was unable to capture the Champions League crown during his time at the Allianz Arena.
Despite this failure to deliver European success Breitner insists that the Spaniard's legacy is not tarnished in any way.
"Pep gave Bayern its most beautiful, attractive and best football the club has ever seen," Breitner told TZ.
"I am not judging him on what Bayern did in the Champions League, but on his legacy. And his legacy is amazing. Pep launched the third stage of a multistage rocket at Bayern.
"Louis van Gaal ignited the first stage by bringing his possession-based philosophy to the club. Jupp [Heynckes] then added movement to that philosophy during the second stage. Nobody could predict what would happen anymore.
"And then Pep perfected matters by bringing even more flexibility and pace. He used the foundation laid by his two predecessors and perfected matters."