If you were a kid during the 1970's or 1980's, you probably watched some cartoons by the Filmation animation house. They produced cartoons as varied as Masters of the Universe and Fat Albert and the Cosby Kids.
Lou Scheimer was the founder and guiding force behind Filmation Studios. He passed away on October 17, 2013, a few days short of his 85th bithday.
This is a link to a blog by Mark Evanier, remembering Lou: