FindNearWith

public Transform FindNearWith (Transform target)
{
    if (items.Count == 0) return null;
    Func<Transform, float?> getDist = x => Vector3.Distance (x.position, target.position);
    return items.Aggregate ((curMin, x) => (curMin == null || (getDist (x) ?? float.MaxValue) < getDist (x) ? x : curMin));
}