I don't know any and I'm around them Lutherans all the time. If they are even approaching 1% of the level of RCs and Mary, it would be in every paper, especially Catholic ones. While I am thankful to God for raising up ML, it would never occur to me to pray to him, or call upon him for anything. In heaven he has much bigger fish to fry so to speak, as do all who have passed to their reward. So these Lutherans you speak of much be conservatives, since the liberal ones have ceased being Christian IMO let alone Lutheran. All his published work is centered on the Members of the Trinity, not himself.
The Book of Concord and Lutheran Confessions can also become an idol. The LCMS can become an idol. The church building can become an idol. Our faith can become an idol. The Bible can become an idol. for most people money is an idol. Whatever you put your trust in becomes an idol. Our God is a jealous God. Thou shalt have no other God's before me.