Maintained 5000' on a 34 DOSEL SID out of Melbourne recently with inbound traffic at 6000' positioning on the ARBEY for 27. Us in the right turn, them in the left turning downwind. 1000' vertically separated but essentially pointing our wing tips at each other. Looked freaking awesome but I'm surprised that one of the pax didn't call the media to claim a near miss.
The other one I've done a while back was established on 16L into Sydney when a 744 was vectored onto 16R a couple of hundred feet above or below. We got a great view of their underbelly as they rolled onto final. It was so impressive (and potentially newsworthy for someone who had taken a photo) that I made a PA on the ground explaining what had occurred and our differing altitudes, etc.