What kind of other dogs usually get along with a great dane?

We have a 1yr old great dane, a spayed female. We would like to get another dog that is not a dane, preferably about the size of a cocker spaniel or smaller (but not as small as a toy dog) ... We know that personalities will be the biggest deciding factor... and we would get the new dog as a pup but we dont know what kinds of breeds they tend to get along with... if you have a dane what other dogs do you have?