For 10 points, name this composer nicknamed "le grand" to distinguish him from the rest of his musical family, whose 'Tombstone' titles a piano suite by Ravel.
Jordi Savall claims that this man believed in the "ability of music (with a capital M) to express itself in prose and poetry."  One of his pieces for organ was based on his Messe pour les parroises, and he also created a Messe pour les couvents. His chamber music includes Les goûts-Réünis, which were continuations of his Royal Concerts, and he brought the trio sonata form to his home country in works like The Nations and Parnassus, or the Apotheosis of Corelli.  His theoretical works include Rules for Accompaniment, as well as the manual The Art of Harpsichord Playing, and he partially inspired a work by another composer written to honor six soldiers killed in WWI. For 10 points, name this composer nicknamed "le grand" to distinguish him from the rest of his musical family, whose 'Tombstone' titles a piano suite by Ravel.
Jordi Savall claims that this man believed in the "ability of music (with a capital M) to express itself in prose and poetry."  
{Francois Couperin}