This is a riposte at the level of "Then name all composers. Nanananana." Obviously, the answer to your question is going to be "no," but really a great amount of music is available to us, and everything that came before the Renaissance was, crudely put, simple music. So the commenter can be considered to be able to weigh Bach's merits against those of other artists'.

IMO too, Bach is the greatest. There's really no-one who can so seamlessly merge content and form and achieve intellectually, musically and emotionally fulfilling results.