The prevailing point of view among non-religious scientists (as well as here) is that mental processes (the mind) are reducible to the physical processes in the brain. This part is rather uncontroversial, even Searle agrees with it. Out of the alternatives described on Wikipedia Emergent Materialism is probably the closest to the mainstream thought here:

Emergent materialism explicitly denies that mental properties are reducible to physical processes, so I don't think it's closest to mainstream thought here. Emergence is often used in philosophy as an alternative to reduction. Or did you just mean the closest out of all the versions of property dualism?

I suspect the view in the philosophical taxonomy closest to the LW mainstream is functionalism.