Synonyms for Romanticist (same or very similar meaning)
WordNet sense 1 (someone who indulges in excessive sentimentality):
sentimentalistWordNet sense 2 (an artist of the Romantic Movement or someone influenced by Romanticism):
romanticWordNet sense 3 (belonging to or characteristic of romanticism or the Romantic Movement in the arts):
romanticisticFrom the ODE community, based on WordNetadd/edit