Hi Rush!!
(seen this post before!) Hank Marvin was and still is a JW as I recall. I met him once at Twickenham back in the 80's wearing those hideous red rimmed glasses, seemed like a nice bloke though.....
I'm sure you must have heard of the others...... Prince, Jacksons (maybe just the mother now) The Williams sisters (tennis), ......and yes the bloke who banged the gong in the J. Arthur Rank films (though that had a slightly different connatation when I was at school)
Incidently I read recently that Chaka Khan is studying (??) and Harrison Ford has even done the same (???????!!!!!!!!!) Guess you can't believe everything.......
I'm sure others know of more...............