The last point I will add to all of this is that despite socionics representing the ENTJ-ISFJ interaction as a conflict relationship, I think that given an ENTJ male and an ISFJ woman, under the right conditions it may in-fact be a healthy and suitable match.
Firstly, there is something to be said for having different skill sets. Although ENTJs and ISFJs share zero functions in common, assuming a proper understanding of one-another I can see how they would be a good business-duo. As an example, my parents are INTJ-ESFJ, also considered a conflict relationship under Socionics. They ended up divorcing after a long marriage, and are still on pretty good terms, but were just not a long-term, suitable match. But, they were excellent business partners and have always been very successful in this regard.
Secondly, I think the ISFJ female generally possesses many virtuous traits that are lost on other types, like compassion, loyalty, stability, and thoughtfulness—and, unlike my parents’ INTJ-ESFJ interaction, where the woman’s Fe can very much get on the nerves of the introverted INTJ, I believe that a female ISFJ could be very grounding (in a good way) for the ENTJ male. Thinking back to the movie (and book), The Godfather, I am reminded of the relationship between Vito Corleone and his wife, who was characterized as being a devoted, unquestioning, and loving companion. Of course, Vito’s marriage is the old-school type where the man has his domain, and the woman has hers, but given this structure it seems like a very healthy and secure match.