If you are asking for the least bad of "two evils," as it were, a drunk would be safer. A womanizer is liable to give his wife a fatal sexually transmitted disease.
A drunk does not put his wife's life in danger -- unless "he gets violent when he's drunk"; and this points to a much deeper and more profound issue that is not just about the drinking, if you know what I mean.
If a fellow has a reputation as a "nasty drunk," it could very well be that he drinks to cover up his nastiness -- because he does not want this side of his personality associated with his sober self ----- then he might lose all of his friends.
Anyhoo... its hard to pick a least worst scenario when you really get to thinking about it.