Most of you should know doctor whooves right?:

And we know that canonically that he's hanging around with Rose Luck right now:

Where as Derpy, everyones favorite pony to pair with the Doctor, I'd like to think of as Equestira's version of Sarah Jane:

So my question is, what other ponies do you think represent what people from the Whoverse?

4268360 ...That makes so much sense, I feel stupid I didn't see it sooner.

4282906 - To be honest, it never occurred to me until you asked the question. :)