twanglife after 50, 60, 70 ...

[Tom Smith]

Hey folks,
I've got to write a short article about what the lives of 
famous or historical people looked like at later key ages, 
particularly after 50 (examples include: Frank Lloyd Wright, 
Sidney Greenstreet - even Philip Glass, who apparently was 
a plumber until he hit 40).  
Musical suggestions would be appreciated (interesting 
non-musical examples too, for that matter).
Twang example: Don Walser
Thanks!
Tom Smith