6. John Pertwee (Third Doctor)
The Third Doctor was the first really action-packed Doctor. Pertwee’s version of our favorite time traveler would routinely get into brawls, karate chop his opponents, and occasionally get into a sword fight. His run was the first in Doctor Who to be in color, and he was the first Doctor to go for more than three years, having finished five seasons as the Doctor. His run had the Doctor mostly earthbound without his TARDIS, but the stories were still great.