Formalist (noun)

1. A person who adheres to strict rules and forms, especially in art or literature.
2. A person who places excessive emphasis on form or rules, especially in art or literature, at the expense of content or meaning.

Origin:

From formalism (noun) meaning strict adherence to rules and forms, especially in art or literature.

Examples:

1. The critic was a formalist.
2. The architect was a formalist.
3. The musician was a formalist.
4. The poet was a formalist.
5. The painter was a formalist.