There was a guy in my WoW guild who had an incredible voice, like professional voiceover worthy. Apparently he worked as a vocal coach. Probably not hugely remarkable in itself, but how often do you actually meet people who sound like they should be doing movie trailers? He could do pretty good impersonations too. The only thing is I'm sure it got damn tiresome for him to log on to vent and be instantly bombarded with 'OMG your voice is teh sex' from girls (and a few of the guys) and 'Do your ' from others. Mainly me.
As for more famous people... um, I'm going to go for Rob Brydon, Welsh comedian, not only for his lilting accent but for his great range of vocal tricks. His 'man stuck in a box' is... well, it's a lot better than it sounds.