Again if you're interested, I can do color versions and digital art versions. AKA a more cleaned up style.
One thing about Cooke. I know you said you like your character designs, yet all of them had just a beard and no other facial hair. I felt like Cooke needed a little more to add the “Mad Dog” part. So I added a shabby full beard and not as long. Sorry about that.
Also my scanner isn't plugged up so I had to use a digi cam. So all the images are actually reverse of what they should be >>;





Again these were done in about 15-20 minutes. Sorry sorry.
I hope this helps some.
you can check out my portfolio here:
http://www.kissykissygoogoo.com
If some style on their appeals to you more, let me know. I also tried to vary how all these above sketches looked, so you could choose the style you like more.