Anastasia brow pencil--because they have such a wide selection of colors. (The color that most closely matches my brows isn't found in other lines.)
I use mostly products that are more natural, so I don't use too many "classics." I have a lot of Jane Iredale. It's pricey, but I don't wear makeup a lot, so I can afford to splurge.
As far as La Roche Posay goes, I have sometimes used their Eau thermale, in the spray bottle. I think that is somewhat of a classic. I put a few drops of an oil blend in my palm and then spray some water on top, then mix it up and use it on my face under my moisturizer.