Hanna-Barbera produced a nifty adventure cartoon in the 1960s called Space Ghost. It ran in syndication for a number of years in the 70s which is when I eventually caught it.
Space Ghost was designed by now-legendary comic book artist Alex Toth. I found these early Space Ghost designs at a blog called Rip Jaggers Dojo. It's always interesting to me to see an artist's design process (that early sketch would have been more cumbersome to animate). That first sketch with the boots and the underwear on the outside would have made Space Ghost just another standard superhero costume knockoff.
Mr. Toth's overall creedo of "less is more" prevailed and he nailed it with his amazing final minimalist Space Ghost costume design (among other refinements, no boots, no undies on the outside).