Thread:GingoFTW/@comment-25289363-20181110030750

I found the additional voices for The Grinch on IMDB. They are:

Lori Alan, Carter Hastings, Carlos Alazraqui, John Kassir, Doug Burch, Evan Kishiyama, Catherine Cavadini, Danny Mann, Tucker Chandler, Jeremy Maxwell, Townsend Coleman, Scott Mosier, Meilee Condron, Abby Craden, Dashiell Priestley, Brian T. Delaney, Alex Puccinelli, John DeMita, Emma Elizabeth Shannon, Bill Farmer, Joel Swetow, Aaron Fors, Mindy Sterling, Willow Geer, Tara Strong, Jess Harnell, Regina Taufen, Barbara Harris, and Jim Ward. 