The Prince is technically silent in the games but makes weird noises when he gets rolled up. Also, he speaks during the webcomic I think Link is canonly mute and Steve used to make noises. Not sure about everyone else and their silence, though
So, Link, Johnny Topside (Aka Subject Delta) Chell, Gordon Freeman, Claude, Sackboy, Kirby, Steve. That's all. I Didn't know the green one, the one with the red hat, and the other in green. I guess he's from Halo series.