Darksider
Super Freak
Appo was the commander of the 501st in the Dark Horse one-shot Purge, released shortly after ROTS. I recall mention of a commander at the Jedi Temple massacre who was not Appo, but either didn't appear on screen, or had no visible distinction of rank. That's who I was thinking of, but now I'm thinking he was a Shock Trooper, or at Kashyyk, which makes me think I have no clue whatsoever.
Then im right there with you.