As a 12 year old I would have had all these players signed pictures (printed) out of a magazine on my bedroom, I can't recognize any more signatures than have already been mentioned though.
However wanted to say, love it ! - not our greatest era on and off the pitch but arguably our most iconic era,
I am not sure of the current market for Chelsea memorabilia I don't think items are going to make you rich. I noticed and I am not sure that it is the photography that the signatures are starting to fade a bit I would suggest maybe having it put in a frame to preserve it, might be worth that small investment in the long term.