Is it possible to say who was a true revolutionary musician of his day?

many composers who worked during times of change are labeled "revolutionaries" even though this is not always true. when you take a closer look you will find that many werent that revolutionary at all. musical developments are always both highly traditional (students need teachers who teach what they were being taught) and revolutionary at the same time (every composer wants to be remembered for a landmark opus). this is inherent to music itself. the most important revolutionaries imao were the nameless composers of the dark ages whose unknown efforts eventually led to the notre dame school that popped up out of the clear blue sky around 1200. we hardly know anything (except for some chant-like scraps) about the decades or perhaps centuries of work of those who made it possible to notate and execute the organum and the development of genuine polyphonic thinking. js bach was perhaps the most important revolutionary regarding the practical availabilty of all 24 keys. to me mozart is the exact opposite of a revolutionary but this is my personal opinion. genuine musical revolutionaries always cause fundamental changes (eg well-tempered tuning, new forms) and dont just excel in their perhaps congenial personal development of schools and ideas that had been around for a long time (which is especially true for the so-called clical epoch and its immediate pedecessors crammed with long forgotten names). regarding monteverdi i hate to tell you that he himself was by no means a revolutionary. the early baroque started with the florence school before 1594. monteverdi was a highly traditional renaissance composer back then. count bardi and his friends "invented" monody, and jacopo peri and giulio caccini wrote what is known as the first "operas" ("dafne", c. 1594, lost; "euridice", extant, published 1600). some say that theryre not operas in the strict sense but rather accompanied plays (ger: singspiel). monteverdi realized that there was a chance for big cash and even bigger honors, hopped on, and staged his first opera seven (!) years later in 1607. compare "euridice" with "l'orfeo" regarding their form and youll be amazed. monteverdis role in the development of the so-called baroque (actually were talking monody, prima prattica and seconda prattica) is probably one of the greatest myths in musical history.