Why did El Greco leave few important followers after his death?

El Greco left few important followers after his death in 1614 primarily because his artistic style was exceptionally personal and individualistic, making it difficult for others to replicate or sustain. While his son and a few unknown painters produced copies of his work, these lacked the power and unique vision of the master.1

Furthermore, the artistic landscape shifted rapidly following his passing. The rising Baroque style, championed by artists such as Caravaggio and the Carracci family, effectively supplanted the 16th-century Mannerism that had characterized El Greco's later work. Consequently, because his art was so deeply tied to his own unprecedented emotional power and imagination, it did not survive as a conventional school after he was gone.1