Adopting a domestic short hair to keep maine coon company?

[montymainecoon]

We have a gorgeous maine coon male who is 1.5 years old and we were wanting to get him a friend to play with as he is really active. We saw a gorgeous 6 month old female domestic short hair at an animal rescue center at out local shops today which our daughter fell in love with. I was wondering how other people have gone with giving their maine coon a friend particularly a smaller cat?