What are some of your favourite performances from spaghetti actors outside of the genre?
I haven't seen a lot, but some that come to mind:
George Hilton in The Case of the Scorpion's Tail, his smarmy charm is used very well in this giallo
Cameron Mitchell in Felini Satyricon
Klaus Kinski in Aguirre: The Wrath of God
Brett Halsey in Risk Factor, terrible DTV action film where Halsey acts circles around everyone he shares the screen with