European native version of the narive american 3 sisters?

I have been reading about the native american farming system called the 3 sisters and have been amazed by the beutiful simplicity of how they all compliment each other both in time of growth, nutritional balancing and overall effectiveness. This got me thinking about if there was a possible equivalent using european native species in the UK, i know that Broad (Fava) Beans or Peas could serve as the 2nd sister as it is a nitrogen fixing legume, what other plant species could fill the roles of corn and squashes? Or might there be a different approach maybe with 1 or 2 more plants?