Cesar Franck is one of my favorite classical composers. He wrote his Prelude, Fugue et Variation Op.18 in 1862 and he dedicated it to another French composer with whom he studied: Camille Saint-Saëns.
I often heard my father play this piece in my childhood and fell in love with it ever since. When I was asked to do a concert with big band and grand organ in a church I arranged it for big band.
The melodic lines are divided over several wind instruments and the piano or keyboard has an accompanying role.
No real audio at the moment, the audio here is done with computersamples, but it gives an idea of the piece.
An example of the score (though poor sound) can be found here: https://sibl.pub/HkLYuUjAb