Boss/Enemy Silhouette Thumbnails Update

A helpful friend gave me some criticism explaining that my thumbnails for my villain characters where too tame. They weren't particularly scary considering some of them are massive in size. I have tried changing some and tweaking in the hope that they now look a bit more intimidating. I keep getting worried that I will lose that steampunk effect, but It's early stages of the design so i think I should just trust that later on in the process, they will begin to resemble this.

I also added two extra thumbnails requested by a friend as he thought they also looked nice as silhouettes.