For very young readers my go to title is Animal Comics. Kelly's work in Peter Wheat is also very good for young children. His Our Gang stories are another choice.
Plastic Man was mentioned as a good choice for kids in the 7 and above range. Some silly fun in those!
-Yoc
Hey, Yoc!
I agree with all your suggestions and would add another of my favorites which tends to be overlooked: Dell's
Gene Autry's Champion, with great art by Mo Gollub in
most issues. Gollub was a master of making animals come alive on the page, and that is certainly on display in that title.
https://www.lambiek.net/artists/g/gollub_mo.htmIn fact, expanding beyond Gollub, due to company policy, most Dell comics were kid-friendly. Another great series was Quality's
The Barker by Klaus Nordling.
Finally, based on my own childhood, I'd say that from the time I could first read I was eager to read
any comic I could get my hands on. Superheroes? Fine. Science-fiction? Ditto. War comics? Yeah. So, short of the horror and crime titles (not to echo Wertham too closely), I'd think that anything at DCM would be fair game. What I really could barely put up with, ironically, were comics that were condescendingly aimed at young kids:
Casper,
Hot Stuff, and all the other Harvey titles once the Comics Code was the law of the land!