u/SlidePocket

• Don Ameche - Cocoon
• Dianne Wiest - Parenthood
• Ed Harris - Apollo 13
• Kathleen Quinlan - Apollo 13
• Russell Crowe - A Beautiful Mind
• Jennifer Connelly - A Beautiful Mind
• Paul Giamatti - Cinderella Man
• Frank Langella - Frost/Nixon
• Glenn Close - Hillbilly Elegy

• Jason Robards - Melvin and Howard
• Mary Steenburgen - Melvin and Howard
• Christine Lahti - Swing Shift
• Dean Stockwell - Married to the Mob
• Anthony Hopkins - The Silence of the Lambs
• Jodie Foster - The Silence of the Lambs
• Tom Hanks - Philadelphia
• Anne Hathaway - Rachel Getting Married

Give examples of actors who could've gotten another Oscar nomination either before or after they won the prize on their only nomination. I'll start.

• Kevin Kline - In & Out
• Chris Cooper - American Beauty
• Jeremy Irons - Dead Ringers
• Mercedes Ruehl - Married to the Mob
• Catherine Zeta-Jones - Traffic
• Kim Basinger - The Natural
• Art Carney - The Late Show
• Tim Robbins - The Player
• Red Buttons - They Shoot Horses, Don't They?