Aha!  Thank you for explaining.  So Maven is the "magician's magician"  though he doesn't have the public recognition of the others, he is an industry-respected innovator and mentor, and those are the criteria that you use to define "great".  We should definitely work on an article about him then.  If you can pile up references on his discussion page (or feel free to take a stab at writing the article itself, if you're comfortable you can stick to WP:NPOV).  Now, my next question is one of terminology.  What word do you use in the industry to distinguish between the publicly-known magicians such as Copperfield, Penn & Teller, Siegfried & Roy, Doug Henning, etc., to define their fame?  If they're not on a list of "great", what list would you put them on?