1. The Doctor.
2. Walter White
4. Sherlock and Watson (tie)
5. The main characters from Scrubs (lots of ties)
honorable mentions: Hal (Malcolm in the middle), Homer Simpson, Cartman, Peter and Stewie Griffin, Peter Capaldi and Claire and Noah Bennet(Heroes), Frasier, Ron Swanson and Tom Haverford, Dwight Shrewt, Barney Stinson, Shawn and Gus, all the Seinfeld peeps, Baby Sinclair (Dinosaurs), Vincent Nigel Murray (Bones), John Snow and Tyrion, Jack Mccoy (Law and Order)