At this stage, there is no harm in dating all 4 if that is what you want to do. If you aren't yet serious or in a relationship, date away and don't get too invested in the one woman. That way you have more of an idea of what works, and you will find it easier to get over any setbacks.
It is probably best to not have a preconceived idea of your ideal woman. You will grow to love someone for who they are and any ideas of what you want go out of the window.
Not sure what else to say at this point.