Do the player characters in Bethesda games like Skyrim and Fallout count as silent? They have no voice acting aside from grunting but have a ton of dialogue options.
Also, a game like Metroid is probably better off with Samus remaining silent. Prime 3 had voice acting, but not a single line from Samus, and it worked so much better than Other M. The isolation and first-person perspective make it that it is the player behind the visor.