I know Donald (who is included on your Chef Mickey's list and I don't believe is seen there) was hard to find for us. But if you're planning to do this over several trips, then you **hopefully** will run into him eventually - I've heard his breakfast at the AK is the best bet.
I agree with jodilt, you might have to settle for pictures of a few in the parade, but have fun trying to get as many as possible - I'd pick two that jodilt listed and eliminate them from yours to get down to 100!
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Been going as a family since 2004! Nine trips and counting! Three MNSSHPs and one MVMCP under our belt. Resorts = CSR, ASMo, POP, ASSports, POR, CBR, OKW & POFQ
Mom to two precious boys!! 
The ONLY MBer I've met...KingOMiami!!
(Even though Kip and I are practically neighbors!!
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(I really KNOW M*I*C*K*E*Y*Mom - not just from MB!!)