I like this Morphe M439 brush for powder foundation as well as for buffing in finishing powder. I’ve used it for liquid foundation and it works well for that too. But I do prefer it for powders.
This Sigma E25 brush is great if you’re doing creasework and want a smaller brush or have smaller eyes. It’s soft but not too fluffy so it won’t blend things out too much and will keep your color localized.