Guild Plants for Scarlet Runner Beans

I’m planting some scarlet runner beans and looking for good guild companions. Maybe just some protectors for the rest of the soil in their planter.

The beans are planted in a regular raised bed (2.5’x3.5′) and will cast some shade on the area that still has room for the other plants. Not very windy in this area but a bit on the arid and low precipitation side (but I can manage watering as needed… no closed system yet, but in my future plans). I’m in growing zone 4b.