This grower is sure of this plant identification.
This is a stonking good plant for wildlife and really easy to grow. It gets big, head height big and more with flomping great leaves. I have root divisions to swap/sell, if potted up they'd need a 2 litre pot.
Inula magnifica (Giant inula). This is a large perennial species producing striking yellow blooms that are surrounded by deep green foliage. This species will require staking and will grow best in average soil that is damp but well drained. It will spread to form a large plant with a prolific blooming habit.
Taller species need support.