Simplify the following text for a Grade 10 native English-speaking person.
Original: However , his more successful works combine this virtuosity with high degree of musical integrity , qualities found in works such as the Symphonie-Passion , the Chemin de la Croix , the Preludes and Fugues , the Esquisses and Ã vocation , and the CortÃ ge et Litanie .
Simplified: Some other very famous works of his include the Symphonie-Passion , the Esquisses and Ã vocation , and the CortÃ ge et Litanie .