The actual answer was provided in a comment to the question:
Yes, cut it back square so that the very top of the joint looks like a butt joint. That should take care of a lot of that fuzzing. [...] – Aloysius Defenestrate Jun 8 '20 at 2:31
This was never clear in the videos I watched.
Once I got that part down, I was generally cutting the copes correctly ...
You could rip it both on the table saw and on the band saw.
With the table saw, you'll need to do at least two cuts, as the depth of cut probably is around 3". If the board is straight and has a clean edge and the table saw is well setup you should have a nearly seamless cut. I've done the same on 4x4's with great success.
Band saws typically have good ...