This is an addendum to the horse and rider entry. Plus I'm feeling nostalgic again.
I've also noticed the design elements such as the differences in sizes, shapes and height. Plus the different color scheme of the characters, and how they relate to each other. Most sidekicks seem to have less detail as well.
(Credits going clockwise) Super Chicken and Fred (by Jay Ward and Bill Scott); Beany and Cecil created by Bob Clampett, Tom Terrific created by Gene Deitch, and Rocky and Bullwinkle (Jay Ward and Bill Scott again).