My oldest is a 1978 12” Mego Hulk that I found at a thrift store for $1, still with its original pants. He’s too deep in the archives for me to snap a photo though. Next up I guess is this original Optimus Prime. Never had one as a kid, but my best friend did. A few years ago he gifted his old Prime to me (he’s not into toys) for helping him move. It is remarkably minty fresh. I have my doubts that he ever touched it back then.
Maybe not my oldest but i doubt many people have seen all of these together. My complete wave1 & wave2 1985 Wuzzles
Not sure which is the oldest because I have most my toys from childhood still but this is the oldest one I can think of that’s currently out and accessible.
Coincidentally, my kid bought the lion bee Wuzzle in your pic from a vintage toy swap meet yesterday.