Another option is getting a pair of fires and you can produce a black-eyed lucy. It's pure white, unlike an ivory which has the line down the back when it's young and isn't really white, just close.
Yellow Bellies are underrated. The thing is they look like normals so people don't like them. Actually, they are nicer than normals but still a subtle morph. And yeah, you can breed them to pretty much anything to produce a stunning animal. They tend to add more contrast, more vibrant colors, and a very clean pattern.