I was fortunate enough to meet Gunther Rall at Oshkosh in 2000. One of the larger aviation art companies had sponsored his appearance and he was there signing autographs. I couldn't believe there were only 4 people at the table! I have a signed portrait and a few other prints now...
BTW - Bob Hoover was also there. I wandered past and saw the elderly gentleman sitting by himself. I had nothing for him to sign so I got him to sign my shirt! He was a little amused...