I usually stay out of discussion about definitive recordings, because you get the usual politics about all the legendary greats that cannot ever be surpassed, eg., piano has to be Gould or Perahia or Argerich, etc. It is a dominating conservative taste that bulldozes any other options into insignificance. Others don't know what they're talking about. Okay, it's true, I'm not a musician, but I do have decades of listening experience based on discovery, not on toeing the line. I think (most of the time) there are many great performances that all have something to offer.
Perfect sounds more subjective, with room for opinion and personal taste.