I'm writing an essay on visual language and have been looking at different theories from Ferdinand de Saussure, Sigmund Freud, Joseph Kosuth, John Berger, Laszlo Mahony- Nagy to name a few. My research leads me to semiotics and how we see art. I'm basing the writing on art with substance(meaning) ie psychoanalytical, political art, etc.
Does anyone have any source material that could be useful in terms of theory?
Or an example of an artist you think has created a successful visual language and why? (Preferably someone in the last 200 years, the more contemporary the better)