1. Tom and Jerry (the classic one) is the best for me.
2. Spongebob seasons 1-5
3. Avatar The Last Airbender(especially season 2)
4. Spiderman (1994)
5. The Penguins from Madagascar
6. Timon and Pumba
7. Looney Tunes (2012)
8. Back at the Barnyad
9. Magi Nation
10. Arthur (until season 14 I think, when the new girl comes)
Other good cartoons: South Park, Avatar Kora (season 1 only), Phinieas and Ferb, Kung fu Panda, Rick and Morty, Cedrick(even though it is French series but still), Fairly Oddparents, RoadRunner, Spider Man Unlimited(1999) and there are more cartoons I like but it is enough I think.