The term 'Giant Actor' can be broken down into three crossword solutions: Mineo (5 letters), DEAN (4 letters), and Salmineo (8 letters). Sal Mineo was an American actor, singer, and dancer who rose to fame in the 1950s. He is best known for his Academy Award-nominated role in the 1955 film Rebel Without a Cause, in which he starred alongside James DEAN. DEAN was an American actor who became a cultural icon of teenage disillusionment and social estrangement. He is best remembered for his roles in Rebel Without a Cause and East of Eden. Both Mineo and DEAN were considered giants of their time, and their legacies continue to influence actors today.