I've talked about the Marc Jacobs #2 brush (review) countless times on my blog because it really is one of my favorite brushes for applying thick and full coverage foundations. I love that (1) the bristles are densely packed, which makes blending a breeze, (2) it absorbs some of the product and prevents foundation from looking heavy & cakey, while still offering the coverage that I need, and (3) it's big enough to cover my entire face quickly, but not too big where it will be difficult to reach certain areas of the face.
I'm constantly on the hunt for something that's comparable, so I can have a backup when the Marc Jacobs one is dirty. The Bdellium Tools BDHD brushes and Morphe Elite II E58 have an angled curved shape that's similar to the Marc Jacobs #2, but do they perform the same?