It wasn’t shiny like that article claims it to be, though that may be because it climbed out of a sink drain. Who knows what was on it. However it does look very close.

This made me look up osmoderma in Pennsylvania which linked me this:

https://bugguide.net/node/view/1664529

This looks exactly like it, and is what you linked. So I think your spot on since it doesn’t seem to need to be iridescent. Thanks for answering! (Sorry for the late reply. I stepped out for a bit like 20 minutes after I posted this)