I came across a picture of Rick Rubin in an issue of Wired that was at work. Luckily I was able to find the image online and work from that. I had the image open in a viewer and when I put the image next to my drawing in Gimp I noticed more things I could change. The overall likeness is there so I think it is better to move on. I noticed with this exercise you could end up in an endless loop of tweaks if you are not careful!
