All is Lost, starring Robert Redford, a sinking sailboat and a life raft, is a remarkable movie. It has essentially one word of dialogue, a very loud fuck about 1/2 way through.
While the direction and cinematography are excellent, it is Redford’s performance that makes this remarkable — and not only in whatever the limited genre of solo films would be (Gravity let George and Sandra keep company). His character is his age, 76, and his age is an important part of the role. He, the character, is also someone who is calm, knows the water, knows his boat, can fix and manage — and that makes the increasing stress and approach of fate work even more powerfully.
See it; you’ll appreciate it!