My favourite "foundation" to wear in the winter for daytime, ex. work, is the Nars tinted moisturizer. It is lightweight, oil free, sheer to buildable medium coverage that evens out my skintone (you will need a concealer on top of this for major imperfections), and keeps my oily skin under control - which is HUGE for me. It also smells amazing, with an orange/citrus scent which helps me to wake up in the mornings! It is meant to also help reduce the appearance of discoloration and dark spots for a clearer and brighter complexion over time.
I do notice that yes, it evens out my skintone, it even blurs and minimizes the appearance of pores on my nose (HUGE X 2). Also a little goes a long way, which is great because it is a bit pricey ($49). I use a pea sized amount and buff it all over my face with a brush.
Buy it here