Sorry it's tough this time around. It sounds as if you have tried so many different things that now there's no real consistency. Have you tried any one thing for long enough yet?
I don't believe in "cry it out" so I would also be responding to nurse at night, but not for "every peep" -- do you know for sure when she's waking for hunger or if she's just restless and would go back to sleep? Try having your husband, not you, go to her and without talking at all, sit next to the crib and lay one hand on her so she feels it -- no interaction, but she will know someone is there. If she gets more restless and clearly is hungry, then feed her. Have husband do it with a bottle. (When she sees you she also smells you and thinks, I can snack now...That's why this needs to be your husband's job, frankly.)
Same procedure with getting her used to the crib. Again, I am not one to leave a baby to cry it out -- that only teaches them to be less secure and not really to "self-soothe." They exhaust themselves rather than self-soothing.
Establish a bedtime routine and do not, do not vary it. Keep the same order and the same amounts of time for each step -- bath, last feed if you do it then (so she's not snacking all night), book in the rocking chair in her room (if you can keep her in her room rather than carry her from, say, the living room TO her room, that could help; if she gets sleepy in another place and is carried to her room, that makes her more wakeful and she associates the movement with "Oh no, they're putting me alone in that crib thing!"
After the routine, put her in the crib, but then sit on the floor next to her with one hand firmly but gently on her leg or arm through the slats. Lights are out, maybe sing ONE last song. Then no talking, no interaction other than your presence and your hand. This can go on for some weeks. Then you will move to sitting in the chair in the room in the dark; then to sitting outside the cracked door in the hall, so she can see you are there, but you are not going to talk to her from there either. Eventually you will simply work up to putting her down, singing one last song, and leaving and coming back after five minutes -- no talking. Then you leave and return in 10 minutes if she is awake, then 20, etc.
This is slow and takes patience but I found it worked very well with getting my daughter to acclimate to being in her own crib in her own room. She began to realize that she was not alone when we left the room. Infants at eight months still do not know or understand that you exist when you are not with them! They think that when you leave you are gone, vanished, permanently. They don't have "object permanence" in their minds yet so if she fusses when you put her in the crib it's possibly largely because she sees that as "You are leaving me alone forever and ever."
So think like she thinks, not like an adult, and don't be afraid to work slowly up to leaving her slightly awake. I know this is a lot of effort but I found it just worked well for us. Please don't compare her to your other kids -- each child can be very, very different.