Sally if Cherokee Purple cracks for you then Black Krim would most certainly crack worse.
With Your liking Early Girl (I like and grow it also) and Celebrity seems like you go for a much more uniform and good looking tomato. So yes, I would really recommend Kakao. I will post another picture of more of those again later.
Perfect looking tomatoes, just truly perfect. But you will have to start you own from seeds. Dark tomato flavor.
Not only do they look good but taste is simply wonderful. So much rich flavor.
If you starting from seeds I also recommend Country Taste. Again perfect tomatoes and plenty of them.
Sometimes I have able to get starts of Balls Beefsteak, another perfect looking tomato. I would recommend it also.
Paul, I have also grown Beefmaster and Beefsteak. Both large and nice tomatoes with great flavor.
I only wish I ever grew a Black Krim fruit that looked nearly as good as those you show pictures of. Mine were simply horrible.