Of course it does, I'm sorry. I did assume you couldn't have tried everything, but then I don't know what your parameters are.
I have only my personal experience to offer and it is probably not much help to you if any.
I will outline what I've done with all three, which is basic - just to accept that they would need me to get them to sleep and to be nearby for feeds etc for quite a while, and that I would rather they did this and that the crying was minimised, than suffer (for me, not so much them!) the crying that would come from my trying to enforce something different.
What I am probably saying is that my requirements are different to yours. I am far more upset and affected by a baby crying, than I am by a baby in my bed. Even if it means they stay there for a few years.
You might have a greater tolerance for crying, and less for your personal space being inhabited by a small child, in which case my method won't work at all for you.
I am surprised, though, genuinely that a child who is held and cuddled and rocked will not settle - unless it is used to having a feed or something as well, one of mine cried for a long time in my arms when I was trying to stop breastfeeding (recurrent mastitis - he was about 13 months I think) and he needed it to get to sleep - I couldn't bear it and just fed him in the end and that was the last time I tried it.
If it's used to being held/cuddled/laid with to go to sleep, I don't understand why that would stop working.
One thing that worked really well for me was to lie with mine, wait till they were sleeping, then carefully remove myself from the bed leaving them in place. This was a winner when I had a friend over or some other (unusual!) social opportunity to take part in.
I'm guessing you're limited as to your sleeping options, if you let her have your bed?
Again it might feel too much like being a martyr. That's not good for you to feel like that.