Some would argue that the driving force behind the enduring popularity of 'The Office' was Steve Carell's Michael Scott. An Americanized and toned down version of Ricky Gervais's David Brent from the original UK version of the show, Michael was a competent salesman who was promoted to the position of regional manager, a job he was drastically under-qualified and overenthusiastic for.
His desperate need to be liked and general desire to make his employees his family made for hilarity week after week until he exited the show in Season 7, leaving both his post as regional manager and the show's main comedic lead up for grabs. He was succeeded by a succession of replacements, all of who had their quirks and traits which made them unique characters, but none of them ever reached his level of popularity.
6. Deangelo Vickers
Finding a replacement for Michael Scott was never going to be easy, but fans initially thought the writers had found a way when Deangelo Vickers, played by the incomparable Will Ferrell, first shared the screen with Steve Carell in a classic comedy skit.
However, the veil soon dropped and Vickers was revealed to both the office workers of Dunder Mifflin and the audience as a sexist and obnoxious boss who made Michael look mature by comparison. Fortunately, he only lasted four episodes before being knocked into a coma by a tragic basketball accident.
5. Creed Bratton
The shortest reigning regional manager in Dunder Mifflin history, the eccentric Creed Bratton barely got to enjoy his brief rush of power before being replaced. He was only ever put in charge because of his long tenure at the company, and was almost immediately replaced by Robert California. Oh well, we liked him better as the negligent quality control agent anyway.
4. Robert California
This is really more of an honorable mention, as Robert California (if that's even his real name) never assumed his post as the regional manager at Dunder Mifflin. After being hired for the job, he walked in on his first day, looked around in disappointment, and then drove all the way to Florida and convinced CEO Jo Bennett to give him her job. And just like that, Dunder Mifflin entered its darkest age yet.
3. Andy Bernard
The point where 'The Office' officially stopped being fun happened somewhere around when Andy Bernard took over as regional manager. Not only did he lose all likable characteristics, but he actively sucked the funny out of every character unfortunate enough to share the screen with him. His romance with Erin was painful to watch, and his negligence as a boss left the other employees floundering.
2. Nellie Bertram
Nellie Bertram's turn as regional manager interrupted Andy's reign while he went to Florida to win Erin back. She simply walked into his office and took his job without a second thought. She was at least somewhat funny, as Catherine Tate does not give unfunny performances, but her lack of tact seemed more out of cruelty than ignorance, and she wasn't as endearing as Michael had been.
1. Dwight Schrute
The show ended with Dwight Schrute finally getting his dream job of regional manager and, after years of watching him offend, alienate, and manipulate the people around him... he turned out to be pretty good at the job. Some of his decisions, like an obtuse security system and mandatory morning tai chi, reflected his tyrannical personality, but he clearly had matured over the course of the show and even used his authority and cleverness two ensure his friends got a hefty severance package when they left the company, proving to viewers everywhere that Dunder Mifflin had been left in good hands.