Complex sentence: He is considered alongside André Grétry and François-André Danican to have been the founder of a new musical genre, the French comic opera, laying a path for other French composers such as Boïeldieu, Auber, Gounod, Bizet, and Massenet in this genre.
Split into simpler sentences: He is considered with André Grétry and François-André Danican to have been the founder of a new musical genre, the French comic opera. He laid a path for other French composers such as Boïeldieu, Auber, Gounod, Bizet, and Massenet in this genre.