Here's the all-time favorite Dr. Who (according to every web site i've ever visited) with an insipid companion:
Elizabeth Sladen survived from the Jon Pertwee era, to be Baker's earliest companion:
One of his most popular companions:
Two incanations of Romana:
A juvenile companion whom i believe was very popular among the ladies:
At end of the Tom Baker era, Sarah Sutton debuted
And, of course the boys like Leela . . . what's not to like ? ! ? ! ?