"Cartoon legend" is no overstatement. Hanna-Barbera cartoons were loved by kids of many generations. I will give my "Hanna-Barbera: Tunes From The Tunes" CD a spin in tribute! (They're all on there ... Top Cat, Yogi Bear, Flintsones, Wacky Races, Hair Bear Bunch, Hong Kong Phooey, Scooby Doo, Banana Splits ...)
William Hanna and Joseph Barbera are so linked with these Saturday morning cartoons from the 1950s onwards that the fact that they created Tom and Jerry back in the 1940s is sometimes overlooked. That's quite a body of work!