There are no "strong" open-minded, compromising JWs. If they are open-minded, or compromising, they are breaking their faith.
Or does he just call himself a JW for the sake of family?
There are also those JWs that are good people...but that also dismiss much of the dogma as silly. Maybe they are "weak" JWs.
JG being one of the stellar exceptions to oil and water not mixing (she is also wise, caring and good), there is little hope that you will have a smooth marriage unless you convert, or he unconverts. Your mileage could vary - but I've seen the ashes of these relationships too often. The attempted suicide of a cousin comes to mind.
so my question is how do i get him to get over that and compermise?
Couples counseling, BEFORE the wedding. Write out a contract of how your kids will be raised, what he will do to become more balanced, what you will do to appease him. And be prepared that his view of God's will may trump that at any time.
Other than that, I'm sorry to say that your query is along the lines of, "How can I have a safe relationship with a poisonous snake, without removing it's poison?" Do the homework up front, or be constantly vigilent and always prepared for a fight.
Just my experience...
The only other comments - Welcome to the Board!
And...I am confused why you find his strong morals so inviting - isn't he breaking those morals to date you?