These actors never won acting Oscars, though some were treated to an honorary award later in their careers. Here are, in my opinion, are their best movies for which they should have taken home acting statues.
Cary Grant was only nominated twice in his long career (for None but the Lonely Heart and Penny Serenade). But he should have been nominated for his turn in this Hitchcock masterpiece. Grant's portrayal of Roger O. Thornhill is one of the finest performances in a thriller ever. In 1969, the Academy gave Grant an honorary award instead.
Richard Burton should have won an Oscar for his performance in this Edward Albee adaptation. His George (perfectly paired with Elizabeth Taylor's Martha) is one of the finest performances in film history. Nominated seven times, Burton never even received an honorary award from the Academy.
Deborah Kerr was nominated but did not win an Oscar for her portrayal as an army wife at Pearl Harbor before the 1941 attack (she should have won for her beach scene with Burt Lancaster alone!). In 1993, Kerr received an honorary Oscar.
Peter Sellers' dark comic turn as Chauncey, the gardener, is one of the most understated performances ever; from a man who was known for his outrageous physical comedy roles (such as the Pink Panther movies). He was never even given an honorary Oscar.