I'm not a expert on Hank Ketcham's ghost artists, but he seems to have a great staff of them. Here's one that's amazing.
This might be another. (if you recognize the artist(s) let us know!)
The Dennis the Menace comics have some of what I think are the most balanced, stylish and skilled cartoon art ever. Ketcham must have also schooled his assistants in the finer points of Milf art.