The Leone trilogy is good, I'd agree there.
My favourites include:
Zulu. Michael Caine's first and a classic.
Breaker Morant, great Boer War military courtroom drama, if a bit propogandistic for the Aussie side, as might be expected...its an aussie film.
Kurosawa's High and Low, Yojimbo, and a number of his other ones.
Martin Short and Charles Grodin in "Clifford" are very funny, I think, but I was somewhat young when it came out. Still love that movie.
WC Fields in Its A Gift is him at his (IMO) best.