A truly great acting performance can't be judged simply on the way a person delivers dialogue. It's better to closely examine how an actor breathes life into a role without the benefit of life-saving words. That is what strips down a performance to its raw essence.
Eddie Redmayne's portrayal of genius Stephen Hawking in "The Theory of Everything" is brilliant. There is beauty in Redmayne's physicality, which gets magnified by the power of all the subtext he delivers in a single look.