I am trying to use this together with the pcomplete suggestions from emacs-fish-completion. However specifying the backend: company-eshell-autosuggest seems to only suggest the autosuggest completions. I assume you have this working looking at your setup and your blog post. If I don't have the company-eshell-autosuggest the other suggestions work very well.

I would like to have the pcomplete first and if nothing else matches fallback to this one.