The classic Doty style involves clean, thin lines punctuated by solid areas of black and/or other colors. Sometimes compositions are simple, yet others can be complicated crowd scenes.
I find it interesting that illustrators who cartoon seem to have career staying-power, especially if they have a distinctive style popular with viewers. This is compared to illustrators in general, who can become victims of their signature style when it goes out of fashion or else are forced to change styles to keep commissions coming.
Here is a Doty sampling.