I have to say that I think you've been very patient and shown time and again that you are your wife's friend and daughter's father, first and always.
From what I can tell, this in and of itself and a wonderful goal to reach.
I think you've done an incredible job in changing yourself and your relationships for the better.
I know you are hurting for the family things you will miss out on with your daughter. (((((((Steph))))))
I think at this point you can say that you've left no stone un-turned in your search for a better relationship.
Perhaps some wise DBers will have a different opinion than I, but I suspect that you've gone as far as you can go.
You've done the things that you can, and now it's time for your wife to do her share of the work. Perhaps she'll never decide to come back to you. I hope that's not how it turns out.
But hopefully, she'll start working on herself and realize that she has a husband who truly cares about the relationship and your child. And she'll never be able to replace that.