I'm in a similar position. I try with both child's dad and his side of the family. At the start of the year I too stopped bothering especially with his family and they've not once asked to see child.
A solicitor advised against what you are talking about, saying the judge could decide he'd be fine on his own with child (which he absolutely would not!! Anger and drug issues!).
One thing I wish is that I'd gone to CMS earlier as it took months to sort out. It doesn't give him any more power as a parent. My child's dad gets it taken directly from his wage as he wouldn't pay. The money I get from him goes in an account for our child, it is the child's money, not mine so he couldn't use that against me, I use my money for our living expenses and his as savings for child's future.
I have set up an email address just for evidence relating to the issues surrounding this problem, the abuse, I make a record of missed visits and why, so that everything is together just in case I died I obviously wouldn't want him to have her so want to arm my family with as much as possible information they should never have to know but may be crucial to a case.
As a PP has said, even if you do all this, in a few months time he may decide he does want in your daughters life etc so though it sounds like you're looking for a bit of closure/arrangement it won't work like that necessarily. As sad as it is, I think the best thing is to just let sleeping dogs lie, if he and his family are not pursuing/accepting contact (even though you've offered it!!) then just try to get on with your life.
You're daughter doesn't deserve that treatment, you have already tried to gain a relationship for her, it's a two way street.