Final answer:
The composer who blends Romantic and Classical styles, inspired by Mozart and Beethoven, with a strong connection between text and music, particularly in art songs, is Franz Schubert.
Step-by-step explanation:
The composer who combines Romantic and Classical elements, and is significantly influenced by Mozart and Beethoven, is well-known for the integration of text and music in art songs, and whose vocal lyricism is a common thread throughout their works, is Franz Schubert. Schubert is among those composers like Schumann, Mendelssohn, and Brahms who took a more conservative approach to Romanticism, adhering more closely to Classical rules while still imbuing their music with Romantic expression. Unlike other composers who more aggressively pushed the bounds, such as Wagner, Schubert and his contemporaries still relied on the foundational elements of Classical music, though they certainly expanded on them to express the depth of Romantic emotion in their compositions.