but with 7 cats I don't think it's really an option for me to get any of them.
If you mean cause they might now get along etc that could be wrong. I have 5 (which is close to 7) and when we got the cats we had my rb Thunder and now we have Rockee. Thunder was a big Shepherd/Golden and Rockee a Lab/Pit who actually hated and still hates outside cats.