Max from Max and Ruby is a character who doesn’t speak in the animated series.
Max is a young bunny, who has a penchant for mischief. His sister Ruby tries to keep him out of trouble, but her efforts are often in vain. The pair live with their parents and grandmother, who does not appear to have any speaking lines.
According to Jim Jinkins, the creator of the show, Max was meant to be mute as he didn’t want the show to revolve around language. This decision was also made because Jinkins wanted Max and Ruby’s relationship to be central to the show.