to me its Oscar Isaac after watching Moon Knight
Underrated actors
I'll keep the ball rolling for this post; I think Billy Crudup is pretty underrated.
Jeremy Allen White in The Bear as Carmy Berzatto is underrated same as Joseph Quinn in Stranger Things as Eddie Munson
Kayli Carter, Julianne Nicholson, Danielle Macdonald, Lili Taylor, Martha Plimpton and Emily Beecham are pretty underrated I'd say.