I'm studying your work and looking for other actors.
Missing, first of all:
From the most famous SWs:
John Philip Law
Antonio Ruiz (boy in the beginning of GBU)
Richard Wyler (Precio de un Hombre)
Walter Barnes (La Resa dei Conti)
Gérard Herter (La Resa dei Conti)
Ivan Rassimov (aka Sean Todd)
Burt Reynolds (as Navajoe Joe!)
Chuck Conners (Kill them all and come back alone)
Gilbert Roland (Any gun can play, Johnny Hamlet)
Andrea Giordana (Johnny Hamlet)
Johnny Halliday (Gli Specialisti)
This'll keep you quiet for some time, amigo!