The only one missing I can think of are the Mew and Mewtwo of the Pokémon Song Best Collection CD. The cards themselves will look exactly the same as the Mew and Mewtwo from the Series #00 WHF cards you’ve already mentioned, but there is a way to distinguish between the two prints when you have the cards in hand.
Apart from that very minor difference in print, you indeed seem to have all of them in your list. Just in case I’ve looked at some of the earliest Unnumbered Promotional Releases, as well as every Bulbapedia page where this set symbol is used, but nothing new popped up that wasn’t already covered in your list. 
Good luck with your collection goals!
EDIT: Ah, @muk beat me to it while I was writing this post apparently. 
Greetz,
Quuador