Mahonia is a great thug of a shrub. A massive holly like evergreen. But is it not worth it for these magnificent yellow plumes in January.
And is it not worth it for being so hardy and durable growing profusely in heavy wet soils. I massively pruned mine this year, chopping back barrow loads and they have rewarded me with abundant colour. So tough, so reliable. Its not surprising they are in the Berberidaceae plant family. Its well worth looking to this family if you want something really tough.