Recommend me some cartoons to watch

Finished another batch of cartoons and was curious if there's some I really need to get around to.

You can recommend pretty much anything besides anime. I have a separate list for that. If there's something in "Plan to watch" you think is a must see, say so and I'll move it way up the list.

The shows that are ongoing are how I currently feel about them. Simpsons and South Park are how I feel about them based on their first 8 seasons since I'm still watching through them.