Thinking of adopting a dog that will get along with Valentine  

I think Valentine would pretty much get along with any dog, unless it is way too hyper or it constantly tried to take away his food. He used to have a smaller dog playmate and they got along okay. Val got along okay with Brownie too, once they got past the sniffing of the rear ends and the initial growl at one another
I think you should just get a dog that you like and we can deal with any behavior problems once the two dogs are together

Well first I would think of the temperment that Valentine has and think what would be best for him do you want a younger dog with energy that might bounce around and annoy the older dog or do you want a dog that is a couple of yrs old that has the edge already taken off of him so that he's not bouncing all over the place. Do you want a dog that is going to require alot attention and grooming .. I mean I could go on and on. The best bet is go to a shelter and pick out a couple of prospective fits and then bring in valentine and see how the two do becuase you don't want to bring home a dog that isn't going to fit with all aspects of you life , it will just frustrate you to no end to have a bad fit.