Probably only Aparo's work on Batman supercedes his fame in comics circles for doing The Spectre with Michael Fleisher for a short run in Adventure Comics in the 1970s.

Click image to view enlargments below from Brave and the Bold #117, 1974 DC Comics, featuring Jim Aparo Artwork
JIm Aparo index at comic book brain
Jim Aparo "Creeper" page from Brave and the Bold #178 from 1981
New Jim Aparo collection coming from DC Comics. Hope it includes the run of Archie Goodwin-penned tales form the mid-seventies. Cover of the book (as advertised so far) is a recoloring of the art Aparo did for the cover of Brave and the Bold 111. See it at 1400 pixels here.