abstractionist

Related or tending to abstractionism, particularly art.

An idealist.

She punishes abstractionists, and will only forgive an induction which is rare and casual.

If you come near them and see what conceits they entertain,—they are abstractionists, and spend their days and nights in dreaming some dream; in expecting the homage of society to some precious scheme, built on a truth, but destitute of proportion in its presentment, of justness in its application, and of all energy of will in the schemer to embody and vitalize it.

Someone who supports or creates abstract art.