HELP 8 month old

I’m curious what is the best sleep training method for my 8 month old. I do not want to do cry it out because he gets to the point of no return after only a few minutes. He is relying on us to rock him to sleep and then wakes up screaming after a bit in his crib even if he is in deep sleep. We also think he has seperation anxiety but he did not sleep at all or do well with room sharing with us because he woke up to every little noise even with a noise machine. TIA