As agreat Apple fan and an owner of a number of Apple products, such as a PowerBook G4 15" 1.5GHz SD and 1.67GHz SD and so on (an Arbiter Elegantiarum shunning use of Windows), another very valuable addition to the list, two in fact, in my view are:
Avadis (Avie) Tevanian, the Chief Software Developer of Apple (OS X being his greatest contribution), see hierunder:
http://www.apple.com/pr/bios/tevanian.html
http://en.wikipedia.org/wiki/Avi_Tevanian
Sal Soghoian
http://en.wikipedia.org/wiki/Sal_Soghoian
http://homepage.mac.com/applescript.guru/
Cheers,
Leo inter hyenaem