The plant below is living in Zone 8-9, it started blooming at the beginning of July and it's 4 - 5 feet tall. There is some foliage throughout the winter. It's right under a Japanese maple and I'd like to move it so I'd also appreciate information about its transplantability and root system.
It looks like Inula magnifica, an herbaceous perennial plant which may reach up to 2m tall https://www.plant-world-seeds.com/store/view_seed_item/4691.
It can be dug up and divided, or simply moved, but this is best done in spring or, better, autumn/fall.