I've just discovered yet another list: List of composers by name, an undifferentiated list of mostly 20th-century names.  We don't need all these lists and they're impossible to maintain!  There's also List of modernist composers, and List of acousmatic-music composers, as well as the more specialised List of 20th century Mexican composers and the List of female composers in the United States during the 20th century that I've mentioned before.  But my favourite bizarre specialised list must be List of composers who employed pipe music.