I originally put together the pawesome items pack, but if you are looking for people to credit- I included the people who made/converted lots of the items within that particular pack. Found an image from one of the old pack's video downloading tutorials that includes more towards the item makers:
(without the slashes in pic)
Also, wasn't quite sure after reading, but this is Legendary Item Pack 4.3 - with just mythical added to the bottom yeah?