How about Michael Fassbender, he's great in everything, even poorly recieved movies. He adds a touch of class. Typical reviews go...
"I didn't care for Prometheus/X-Men:First Class/Inglourious Basterds but the film is still worth seeing just for Michael Fassbender"
He'd make an awesome Sith Lord or Imperial Admiral. Ooooooh look, somebody else on the intra-web has had the same idea...
