Since there are lists of DCAU voice actors in Teen Titans, The Batman, Batman: The Brave and the Bold, and Young Justice, there should be another list for Green Lantern: The Animated Series .
So far, there's Will Friedle (Terry McGinnis in Batman Beyond) who voices Ragnar, Clancy Brown (Lex Luthor) who voices General Zartok, Corey Burton (Brainiac) who voices Cleric Loran and Leph, Jennifer Hale (Giganta and Killer Frost) who voices Carol Ferris/Star Sapphire, and Tara Strong (Batgirl and Queen) who voices Queen Iolande.
It would be really great if anyone do a List of DCAU voice actors in Green Lantern: The Animated Series page.