[Number4]

It depends on the needs of the organization. Usually, you wouldn't want this player to play SS longterm. However, sometimes even short is the place a good bat will go to, if you'd lose a good player at 2nd or 3rd otherwise.
I have this in my organization now - my ex-third baseman was gold glove potential at third, however with his turn DP rating barely adequate at SS. But a prospect at 2nd broke through, too weak arm for SS, and my 2nd baseman is a meh defender, however can play 2nd or 3rd equally average. So I moved the prospect to 2nd, the 2nd baseman to 3rd and my 3rd baseman to SS. In late innings, a defensive substituion of a great glove at SS and movement of my SS to 3b shores up my defense, and until then, my infield trio are mashing homers happily, while being defensively adequate enough.