The LCMS would not work well with the Roman church. We are conservative and therefore mean it when we stick to Scripture as the final authority, no praying to Mary or Saints, assurance of salvation and salvation by grace through faith not works. There is no compromise on these issues and a few others that caused the Reformation in the first place. The Roman church is much closer to the ELCA than the LCMS
Nuance.
LCMS and Roman is pretty close and they can definitely work together on social issues because they see eye to eye on most things. I’m not saying they are the same, there are differences for sure. However, if you are LCMS and there is no church around, you would not feel foreign and doctrinally not hear things you reject in a Roman service and vice versa.
Ask your pastor if when traveling and no LCMS church is nearby, should you rather go to an ELCA church or Catholic one? I bet I know how he will answer. I bet he’ll tell you Catholic ahead for at least 11 of 15 other major Protestant denominations. But ask him.
Your comment; “when we stick to Scripture as the final authority, no praying to Mary or Saints, assurance of salvation and salvation by grace through faith not works. There is no compromise on these issues and a few others that caused the Reformation in the first place.”
So where does it say that the Bible is the only authority of the teachings of Jesus?
Do you then reject the authority of Jesus to give His authority to Peter and his successors?
Jesus says “And I tell you, you are Peter, and on this rock I will build my Church (Catholic Church). I will build my Church and the gates of Hades shall not prevail against it. I will give you the keys to the kingdom oh heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.” (Matthew 16:18-19) So please explain your understanding of Jesus giving authority to His Church?
Jesus us told us to pray for others “But I say to you, Love your enemies and pray for those that persecute you. (Matt 5:44) So those in Heaven and closer to God free of other distractions, their prayers have greater confidence and devotion than anyone on earth. We should be thankful for the prayers of Mary and the saints. The saints prayers are offered up in Revelations 5:8 “and with golden bowls of incense, which are the prayers of the saints” The Body of Christ (including those in Heaven) pray for each other to God.
“Let your light so shine before men, that they may see your good works and give glory to your Father who is in Heaven.” (Matt 5:16) Jesus wants us to do good works with faith and love so that we may join Him in Heaven.
Your comment: “There is no compromise on these issues” I agree. Can you substantiate your beliefs in your doctrines?