OK,i was really bored, so i looked at the list, and here is who is not in a match:
HHH
Rob Conway
Ric Flair
Mankind
Chris Masters
British Bulldog
Shelton Benjamin
Chavo Guerrero
Heidenreich
Mohammed Hassan
(I don't know about HHH, because he has been requested for a match with cena, who is already in a match)
The Showstopper, The Heart Break Kid,
The Icon!