I found this laying around at http://thundercats.vpga.com/cast/

The ThunderCats cartoon show was Rankin-Bass Production that premiered in September 1985. Not many people know that the ThunderCats series was produced in 1983, and wasn't officially released until 1985.

Created By Ted Wolf

Larry Kenney - Lion-O and Jackalman
Lynne Lipton - Cheetara, Wilykit, Luna, Queen Luna, Warrior Maidens
Peter Newman - Tygra, Wilykat, Ben-Gali, Monkian, The Demolisher
Earl Hyman - Panthro, Red-Eye, Hammer-Hand, Captian Cracker, Grune the Destroyer, Mongor and the Ancient Spirits of Evil
Robert McFadden - Snarf, Snarfer
Earl Hammond - Jaga, Mumm-Ra, Slythe, Tugg-Mugg, Amuck, Vulture-Man, Hachiman, Pumm-Ra, Ro-Bear (burbils)
Gerianne Rapheal - Pumyra, Mumm-Rana, Jagara, Chilla
Doug Preis - Lynx-O, Alluro