Aside from having one of the most delightful names in showbusiness, Benedict Cumberbatch is an outstanding character actor. The Brit completely disappears into every part he's asked to play. Fans of superhero movies will instantly recognize him as Doctor Strange from 'The Avengers,' although he's also played a larger-than-life character in 'Star Trek' when he played the superhuman villain Khan. Fan of cult television probably preferred him as a modernized version of Sherlock Holmes in 'Sherlock.'
For all of Cumberbatch's fantastic achievements, there's still one role he hasn't played that he'd be perfect for. If somebody decided to turn the iconic adult cartoon 'Beavis and Butthead' into a live-action movie (which happens to be a great idea - take note, Hollywood!), then he'd be the first in line to play Butthead. He might be playing against type by becoming crude and lewd, but there isn't a closer physical match for the character anywhere in the acting profession.