Being relatively new here, I can't say I have seen the other threads. I did a search and found the one that mentioned Gypsy Rose Lee, actors Gary Burghoff, Karl Malden and Ernest Borgnine, along with tennis star Maria Sharapova (not lately, I would guess).
Re: the Karl Rove comment, I think Linn's reported that a handful of APS members resigned a couple years ago when Rove made the keynote speech at the annual APS Stampshow (maybe in Richmond?)
Probably these have all been mentioned before - but for the newbie likes of me and others -
John Lennon and Freddie Mercury, of course, as kids (who didn't).
Supposedly Ron Wood, of the Rolling Stones.
Author Lawrence Block ("Hit Man" series and now Linn's columnist).
Col. Edward "Ned" Green (second purchaser of the 100-sheet of inverted Jennys).
There is no hard evidence, but I would bet "Simpsons" creator Matt Groening is - he made several stamp collecting references on the show and they all just had the feel of someone who knew the hobby.
Michigan Sen. Carl Levin
Amelia Earhart (I saw part of her collection this past summer at the U.S. National Postal Museum)
The Postal Museum has a list - which I just found after I started this post
http://www.postalmuseum.si.edu/coll...index.html#4 Some website I saw said author Ayn Rand did.