I didn't watch many of these. I have a vague recollection of watching Heathcliff (minus Dingbat) when I was very, very young, and loving it.

Didn't get the Richie Rich/Scooby double, but I also disqualify that due to the Scrappy factor.

As for watching cartoons at a very early age, I still remember this cartoon of a group fighting another (?) on some sort of disco, multi-coloured platform, possibly a floating one. And one of the heroines used her long platted hair or ponytail as her weapon. If you have any idea what I'm talking about, you will have my undying affection forever and ever..