I loved Andy Pandy as a child, from the 1950's, and when they were released on video I remember being shocked to see puppet strings as thick as telephone cables.
During my teaching days, we had to reschedule some staff meetings so that we teachers didn't miss The Magic Roundabout!
Like others here, I greatly enjoyed Top Cat and Yogi Bear as a child but also Captain Pugwash (although I could never work out why I liked it) and, of course, The Flintstones.
I never liked cartoons much, but loved the Flowerpot Men and The Woodentops! I liked the disney Animated films like Cinderella. To be honest, there was only a couple of hours of childrens television back then 1hr at lunchtime and the same in the afternoon. I never saw television all until I was 5.
Nobody has mentioned the bestest ever - Bullwinkle the Moose, with Boris and Natasha! Probably because it was on too late (11pm) and was before your time!
Forgot to mention Foghor I say Foghorn Leghorn and Daffy Duck. Popeye not PC at all with all his
anti-Japanese antics, so we're unlikely to see him on childrens' tv channels.