Final answer:
Ludwig van Beethoven is known for his highly individual and iconoclastic style, bridging the Classical and Romantic periods in music.
Step-by-step explanation:
The composer who is known for having a highly individual and iconoclastic style among the options given is Ludwig van Beethoven. Beethoven's early works were rooted in the Classical period, but his later compositions, which include some of his most renowned pieces, embraced and exemplified the emotional intensity and innovation of the Romantic era. Unlike some of his contemporaries who followed a more conservative path, Beethoven was a bridge between the Classical and Romantic periods, and his music challenged and expanded the boundaries of musical composition and expression.