Midjourney has developed a method for creating consistent styles. They've got it down to a science. Their method ensures that every piece produced with the style code is consistent.
I've mentioned here in the past that if I were art directing a magazine today I'd be leaning heavily on generative AI images and software.
Here is a sampling of a loose gauche style that I might use for public figures. Here are a few that I've created. The style is a loose flat brush technique in a Zorn(ish) color palette.
Alas I'm bit long in the tooth to be handling the intense deadline pressures of such a job.