Alright, so now I'm going to accept the Maiden and the Dark Angel.
I'm not 100% sure about the Horned Reaper, but I think I'll take a chance and I will accept the Horned Reaper as well. I'll be a bit strict on what I do and what I don't allow for Horned Reaper profiles, however. If it really doesn't work out, then I'll make the Horned Reaper an enemy only class.
I will update the other Creatures to add characteristics in addition to updating the Heroes later.