Ignorance, Glutton, Wraith thumbnails

[meat]

I need to make 3 boss monsters based on the 3 Poisons - Ignorance (represented by pig), Glutton (represented by rooster), and Wraith (represented by serpent). These are my thumbnails for them so far, and I'm working on improving them right now before starting to render. Any feedback on composition, texture suggestion, detail shape suggestion, etc etc, will be greatly appreciate!