It's a familiar and ever recurring theme in the cinema that some actors and actresses are hand-picked for the same sort of roles time and time again. Sometimes this can translate into literally playing the same character in almost every film, for example Stallone/Schwarzenegger, or Jack Black. Other times you just need someone who can fill a role similar in principle to most of their other parts, but with subtle changes depending on the mood of the movie, such as Scarlett Johansson. But then you just have the actors who are more or less stealing a living by doing the exact same thing every single time they turn up on set...because they aren't even acting. As an honorable mention for an example, we'll use Sir Christopher Lee's appearance in the Lord of the Rings trilogy, where he played all round nasty-moody wizard Saruman. Lee has been acting since roughly around the same time that Crusades ended, and has a reputation for playing only the most evil and sinister of villains, the most notable of which is Dracula during the Hammer Horror productions. Therefore, I argue that by the time the filming for Lord of the Rings began filming, Lee had simply accepted that he actually was an evil wizard, drawing upon his previous experience with necromancy and dark magic from the aforementioned Dracula films and The Wickerman, and so just rocked up on set and allowed the cameras to film him as he went about his daily business. But let's not confuse the purpose of this argument here; I'm not necessarily saying that those included on this list are bad actors for what they do (especially not Lee), just that they have, for the majority of their career, not actually taken part in the whole acting malarky. Although there are a good fews names that will crop up who most definitely aren't good actors even when they give it a go.
