Tom Cruise, Gerard Butler, Christian Bale, Jennifer Anniston, Jim Carrey, Adam Sandler, Ben Stiller, Jack Black (IDK if he's rated highly I just fucking hate him).....God I could go on and on. I pretty much dislike the average actor's performance and find most of them phony and unconvincing anyway. It's most of the reason I don't watch too many movies.
Ryan Gosling. I liked him in the movie "Stay", but he always struck me as generic. Take "Drive" for example, you'd think he was a Cerebral Palsy victim with all the retarded blank stares he does throughout the entire movie.