http://www.i-mockery.com/halloween/g...livingdead.php
Tar Zombie definitely is one of the all-time greatest ones to ever grace the screen.
As for Bubs, he's awesome but I always loved the zombie at the beginning of that movie when the title comes up:
http://www.i-mockery.com/halloween/g...yofthedead.php
Another one I really like is the classic one from "Zombie" - the one on the cover of the movie that everybody's seen before and it drives that woman's eye straight into the big splinter of wood. That one is pretty much the zombie I think of when I think about how a zombie looks.