Intercropping with Lilac

Zone 6a. What can be planted between lilacs? We currently have violet, strawberry, yarrow, anise hyssop, and mugwort (not by choice lol) so far but may want to intercrop a couple small / pollard-able trees (maybe mulberry?) and some other perennials that play nice while the lilacs are still young and haven’t formed dense root systems. Hoping to have some privacy from the neighbors, food for us and/or the chickens, and some beautiful flowers throughout the year.