Aquaman - Peter David first and foremost, Morisson, Pfeifer and waiting on the Brave & Bold issue by JMS.
JLA - Morisson
New Gods - Kirby,Morisson - for Darkseid add Keithen & Levitz and for Orion Walt Simonson
Superman - Johns
Hal Jordan - Johns
DC Olympians - Perez
Thor - Simonson
Daredevil - Miller
Hulk - Peter David
Spectre - Ostrander
Deadshot - Ostrander
Martian Manhunter - Ostrander and mayyybe Kelly
Flash - Mark Waid still
Batman - tough choice, depends on the style. If you like crazy over the top stuff then Morisson. If you like more down to earth stuff Dini is a good choice. And of course the glory that Denny O'neil is.