post probably have been done before but whatever.
to me the greatest most defiant writer has to be grant morrison; the way he wrote batman stories had such a mystery, creepiness and darkness that really captured what batman was all about and i don't think will ever be repeated. I reallly havent read that much of morrison yet (batman and son, batman and reobin run, RIP [fav book], his JLA run) but from what i read no one tops him
honorable mention: Jeph Loeb: Long halloween is my all time favorite batman story and dark victory and hush are up there too. Loeb wrote good detective stories even though batman never figured out the real killer in LH.
and scott snyder: he is really having a great run right now, court of owls and zero year have been great. when its all said and done this man will be a top 3 batman writer of all time (maybe even number one in others opinion).
who is the batman writer for you?