Best movies that are oscar winners in actor in a leading role category

Actors : Doug McKeon, Henry Fonda, Katharine Hepburn, Jane Fonda,
Directors : Mark Rydell,

Norman is a curmudgeon with an estranged relationship with his daughter Chelsea. At Golden Pond, he and his wife nevertheless agree to care for Billy, the son of Chelsea's new boyfriend, and a most unexpected relationship blooms.

Actors : Penelope Milford, Bruce Dern, Jon Voight, Jane Fonda,
Directors : Hal Ashby,

A woman whose husband is fighting in Vietnam falls in love with another man who suffered a paralyzing combat injury there.

Actors : Quinn Cummings, Richard Dreyfuss, Paul Benedict, Marsha Mason,
Directors : Herbert Ross,

After being dumped by her live-in boyfriend, an unemployed dancer and her 10-year-old daughter are reluctantly forced to live with a struggling off-Broadway actor.

Actors : Betty Buckley, Wilford Brimley, Tess Harper, Robert Duvall,
Directors : Bruce Beresford,

A broken-down, middle-aged country singer gets a new wife, reaches out to his long-lost daughter, and tries to put his troubled life back together.