For Wonder Woman it depends how old you want to go with your comics, but I would recommend the following story arcs:
-The Hiketeia
-Eyes of the Gorgon
-The Circle
-She's a Wonder
-War
-Gods and Mortals
-Bones
-The Golden Perfect
-Guts
-League of One
Those are PROBABLY my top ten (not in order aside from the Hiketeia).
"Reading would be your friend." ~Dave Meltzer