With Ford name dropping the Bicameral Mind theory last night it's all but confirmed to be he (or Bernard) is trying to make sentient life. Ford might even know Bernard is doing it and trying to stop him.
Now that we know about Bernard's son, he may indeed be trying to bring the son back and not Ford bringing his partner back.
For those of you who don't know what the Bicameral Mind Theory is here is a good article on it (about WestWorld in fact)
https://www.inverse.com/article/14264-bicameral-mind-westworld-julian-jaynes-origin-of-consciousness-hbo
But, to summarize it. Jaynes thought that humans didn't exist as we did 3000 years ago. he believes at some point we developed enough language to realize we were sentient and have introspection within our minds and not blame them on supernatural reasons. Basically, we went from walking/talking sex machines to people who cared about art, writing, and anything other than just the physical.
Ford and Bernard are effectively putting the Hosts into the spot Jaynes thought we were at thousands of years ago, and since they learn much faster than we do, they might be a step from true sentience.
And I think that's where we're going with the show. Especially with Ford's story potentially involving religion, because up until our "minds split" the only explanations we had for our own thoughts was "God must be telling me to do this." and There is a great chance Ford is going to tell the Hosts this God in his story is who was talking to them before.