Narcissism and sociopathy have been discussed on and off here, not really psychopathy as that is very extreme. Are some traits similar to all 3 in someone in advanced alcoholism? The answer is mostly yes.
For narcissism, that's on a scale. We all have narcissistic qualities, a small amount is ok, when you start moving too far up that scale, well that's when things get out of balance.
I think many times an alcoholic can display hugely narcissistic qualities, addiction is a self centered pursuit.
It is impossible to know without a psychiatrist diagnosing someone, however, if you identify traits in your ex that fit some of the patterns of these disorders, well you can breath a sigh of relief that he is now far away.