I don't seem to be able to get any of these no matter how many creatures I recycle? What's going on?

Oh I missed the thing to make this a Question how do I do that?

Once the topic is created is impossible to change it (or that I think)

And one question, you are having that problem in the campaign ? there is a well known bug in the version that Gog has that simply don't spawn dark angels in the last level. I don't have the link at hand but probably is in many similar topics in this forum

Here's the link for getting the angels, knights and the rest of the creatures: http:/ /keeperklan.com/attachment.php?attachmentid=1358&d=1392893465

Unzip the files, copy+paste them in
Whereveryouhaveinstalledthegame\Dungeon Keeper 2\Data\editor\maps

and it should work.

PS: I can't post links, so I separated the 2 "//" signs near the beggining of the link. Just unite them with the rest of the sentence and it should work.