Pretty sure anyone I could name would leave me in the dust, so maybe I should just say Sarah Burke. She'd still leave me in the dust I'd bet, but the chairlift rides would be good times.
To be honest I think it's more fun skiing with good friends... it'd be rad to be able to say "I skiied with Seth Morrison", but it doesn't have that same vibe that I particularly like about riding with someone as opposed to alone (which has its own merits).