Me, I'm rather quiet. If I make noises they're just tiny little whimpers when I'm getting close to an orgasm or when I'm actually having one. I get all breathless when I try to speak, and I'm definitely a speaker, so that might count?
BTW, nerdy answer to your comment about mice and screaming: Mice are actually awfully loud during sex... we just can't hear it. The thing is, mice are very chatty creatures, but they "speak" in frequencies that are too high for us to hear. They only squeak in frequencies we can hear when they're pinkies, and once they grow up, when they're angry, distressed or in pain.
And if they're chatty when doing everyday things, just imagine what they're like when they're courting... male mice, in fact, serenade the females with such a high range of sounds that it's been compared to birdsong... and it only gets more frantic while they're actually going at it.
Female mice are also very vocal while they're having sex, though not quite as much as their boys.