Hayley Atwell is brilliant in pretty much everything but I'm not sure if I've really seen very much acting quite like her stoic talking into the radio as the plane goes down in Captain America: The First Avenger. No emotion in these movies, apparently.

https://timworthington.org/2020/03/03/its-good-except-it-sucks-captain-america-the-first-avenger-with-melanie-williams/