Actors with one good film

Whitney Houston - The Bodyguard

Henry Cavill - Mission: Impossible 6

Kristanna Loken - Terminator 3

Brad Pitt has like 2 or 3

Eric Bogosian - Talk Radio (1988) ⤵️
https://m.imdb.com/title/tt0096219/?ref_=m_nmfmd_act_47

Julia Roberts comes to mind. I thought she was okay in Pretty Woman. I wouldn't say I particularly dislike all the rest of her performances. I dislike some, and find others forgettable. Like, I'm always mildly surprised when I remember she was in Hook.

Harold Russell, Danny Lloyd, Ivan Jandl

Brad Davis in Midnight Express

Peter Ostrum, the actor who portrayed the young boy, Charlie, in 'Willie Wonka and the Chocolate Factory' leaps to mind, not because he was bad in other feature films per se, but in own words, "everybody thinks that acting is such a glamorous profession, but it's a difficult profession." It's his only film. Instead, he went on to pursue his lifelong passion as a veterinarian.