Paul Coker was one of my favorite Mad artists in the 60s. I used to try to copy his style but never quite got it.
He's probably most famous for his monsters called "Horrifying Cliches", but he drew all kinds of stuff-even designing animated cartoons.
It's a very 60s style, but very well drawn and fun. The most obvious part of his style is his unique inking. The lines kind of start and stop and blot at each stop. But that's not what makes him good. The drawings underneath the inking are solid, strong and funny. The shapes he uses are as unique and individual as the inking style. Many people imitated his inking style in the 60s, who didn't draw as well. There is only one real Paul Coker.
http://illustrationart.blogspot.com/search?q=Paul+Coker