You leave a lot of details out, and I prefer to suggest instead of giving advice. First, sorry that you seem to be going through turmoil, even when your husband has been away from that organization.
Seems to me that for some reason, the mental well being of both of you seems to be attached to the JWs. If he's depressed, is there any reason why he can't seek professional help from people who actually can provide good, sound advice?
And what about you? You seem to be a great, loving partner to your husband, but your own mental well being matters too. Do you have friends outside the JWs?
Also, the most important thing is that you have each other. Many ex-JWs like me left the JWs without a clue on how to be social. That was something I had to learn. Going back to the congregation doesn't seem like something that will give him any social skills.
Between the two of you can provide great support. Go out on a date, have fun together. Forget about the WT and enjoy each other's company. The JWs are still going to be there anyway, ready to judge and happy to shun you.