What would be the best companion for a rottweiler?

Aww that's really too bad about APB...I just lost my Rottie (13 y/o)...and I'm getting another Rottie and a pit bull (maybe) why not get another Rottie? The Rottie I had , had a Retreiver mix and they were perfect together...just be sure your 2nd pup is a more submissive doggy