Yes, one of those. Or breed a non-barred rooster to a barred hen, then keep a son to use for breeding (a male with just one barred parent will have one barring gene, which he will give to half of his chicks.)
If you are breeding Lavender, Lavender cuckoo, and Isabel in any combination, all chicks should show the lavender gene.
The color called Lavender should be a diluted version of solid black.
The color/pattern called Isabel should be a diluted version of a red-and-black patterned chicken.
If you...
Those ones will at least breed true for the lavender gene.
It's recessive, so if both parents show it, then all chicks will also show it.
As regards the other traits, I can't tell by looking at the pictures of the parents, but hatching the chicks will probably tell quite a bit about how much...