Who preaches Vishishtadvaita?

Ramanujacharya is famous as the chief proponent of Vishishtadvaita subschool of Vedanta, and his disciples were likely authors of texts such as the Shatyayaniya Upanishad. Ramanujacharya himself wrote influential texts, such as bhasya on the Brahma Sutras and the Bhagavad Gita, all in Sanskrit.