Not just the Three sisters

We've all heard about the Three Sisters method of growing where sweetcorn, climbing beans and squash are grown together and provide benefits to each other. The beans climb the corn stalks, the squash shades the ground between the plants and the beans add nitrogen to the soil.  The RHS suggests growing sunflowers in the mix too. too. https://www.rhs.org.uk/advice/grow-your-...ee-sisters

I've just read an article about Hodmedod's grower of Carlin peas who grows the carlin peas alongside Triticale cereal which provides a  support for the peas to climb up. https://digital-mag.co.uk/waitrosefood-m...eb2025/#90

This has me wondering what other crops could be "buddied up" (as the Hodmedod's grower calls it). Two plants grown in the same place providing double the harvest. 

I'm not really thinking about "companion planting" where one plant acts as a pest deterrent to another, like onions and carrots, but where one plant takes advantage of the physical characteristics of another - like beans climbing up sweetcorn. It could be like hedging your bets - if your sweetcorn is a failure, never mind, because you may still have beans, idea.

Any ideas for other combinations?