Out of these four, I will compare.
I love the feel of Cartoons!'s dragon. There's just something about an overweight dragon that appeals to me. Maybe it's the fact that I want it to replace Snorlax in my heart (Snorlax was my favorite Pokemon in ADV. Generation), or maybe its because I liked his Luchasquid two CAPs back, that I feel like I owe it to him.
DougJustDoug's is one of the best, if only for pure design. However, it does not fit, in my personal opinion, with the layouts we have already established. However, it's a wonderful Pokemon rendition, and I love it.
Cyzir's is probably the most unique in pure design. It has the dragon feel, but most of all it scores in the electric feel department. The Pokemon is just vibrating with electricity, and everything about it seems to jump out at you.
Zanti's is my least favorite out of the four, but I like the stylistic and artistic renditions he managed to cover. It's almost robotic in nature, and the only problem I have is that it feels like it's actually missing the electric type--if only because of its very steel nature.
So, after some deliberation, I must pull for Cartoons! His version is simply amazing, and if it wins, I will put this Pokemon in my permanent team, if only because of how the thing looks. =D