Argan oil is great, for the whole body as well as for hair. Another favourite is fig oil (Barbary Fig). Has similar qualities as argan, but feels slightly "thicker" on hair. These are the two oils I find hard to live without. Highly recommendable!
3 a / low porosity / medium texture and density

Two daughters:
3 c / low porosity / fine texture / medium density
4 a / low porosity / fine texture / high density