Pretty much anything by R Crumb.
When relatively straight, his work had a cartooney nature.
But when the psychedelics were really working him,...when he could see everything as a connected mass of energy, he would call forth focus that would result in a type of creativity that isn't seen in any other way.
He throws the whimsical in everything he does,...but only the unaware view it as whimsical.
The teasingly whimsical, cartoonish stuff,....
,...when posessed with the focus provided by the energy of psychedelics,...