Ok, we’re reaching here, since we’ve gone of “partied with” to have met or spoken to.
I’ve got politicians: met Mondale, Dukakis, Jesse Jackson and Al Gore at a party in 1988. Actually complemented him on a comment he made on a news show the previous week, which seemed to shock him. Met President Ford in 1980 when i was walking near the UM admin building, it’s most famous alum (well maybe Darth Vader’s voice is) the former president walked out the admin building.
I went to high school with the guy who owns the cleveland cavaliers and my his business partner married to my cousin.
I met Jack White of the White Stripes at my Cousin’s wedding, her husband was in 2 bands with Jack and managed them for a bit.
And for hockey fans, Scotty Bowman made the trade, that brought Brendan Shannahan to the Red Wings, from my brother’s living room (there is a certificate stating such there!). I’ve met Gordie Howe. My other brother used to play hockey with Ted Lindsay (when ted was around 70) and the 40 year olds (my brother was part of that) new not to mess with him even then.
But the most famous people i know? CasinoMeister, J Todd and a few others in the industry. 
Will that get me on Letterman’s “Touch with Greatness”? which sounds sooo much better than “name dropping”