Popeye was my go-to. I loved that the voices were so great; I loved the rare appearances of Alice The Goon; I loved Sweet Pea; I loved Popeye's nephews... https://www.youtube.com/watch?v=PxCbvUUZlqU
And it provided Robin Williams with a nice platform to keep his career going after Mork & Mindy! https://www.youtube.com/watch?v=z3YRcq-8uSA
When I was little Mickey Mouse was IT! <3 that mouse! (As a grown-up, I love Fog Horn Leg Horn, even though I can't find it on anymore.)
May never have exactly been a syndicated Cartoon series, but,,, https://www.youtube.com/watch?v=LMpXUd_kesA
He-Man, G-Force (Gatchaman, Battle of the Planets), Mighty Mouse, D+D, MASK, Belle and Sebastian, Noozles, GI Joe, Heathcliff, Shirt-Tales, Speedbuggy... Oh blow me, the list just goes on and on. I was a cartoon maniac.
Voltron, Freakazoid, Shirt Tales... (Not sure if I'm repeating anything yet, but as everyone is noticing.. there are just SO MANY!)