If I can trace the lineage of my faith...
1. The Lord Jesus
2. The Apostle Paul
3. John Wycliffe
4. Martin Luther
5. John Bunyan
6. John Wesley
7. William Seymour
I cannot remove Martin Luther from this list, especially as Wesley had benefited from his teachings...
"In the evening I went very unwillingly to a society in Aldersgate Street, where one was reading Luther’s preface to the Epistle to the Romans. About a quarter before nine, while he was describing the change which God works in the heart through faith in Christ, I felt my heart strangely warmed. I felt I did trust in Christ, Christ alone, for salvation; and an assurance was given me that He had taken away my sins, even mine, and saved me from the law of sin and death." - The Journal of John Wesley
On the life of Martin Luther and of John Calvin I find that these men had suffered health problems. And that these health problems made them irritable men...
Luther had been suffering from ill health for years, including Ménière's disease, vertigo, fainting, tinnitus, anginaand a cataract in one eye. From 1531 to 1546, his health deteriorated further. The years of struggle with Rome, the antagonisms with and among his fellow reformers, and the scandal which ensued from the bigamy of the Philip of Hesse incident, in which Luther had played a leading role, all may have contributed. In 1536, he began to suffer from kidney and bladder stones, and arthritis, and an ear infection ruptured an ear drum. His poor physical health made him short-tempered and even harsher in his writings and comments. His wife Katharina was overheard saying, "Dear husband, you are too rude," and he responded, "They are teaching me to be rude."
His last sermon was delivered at Eisleben, his place of birth, on 15 February 1546, three days before his death. It was "entirely devoted to the obdurate Jews, whom it was a matter of great urgency to expel from all German territory," according to Léon Poliakov. James Mackinnon writes that it concluded with a "fiery summons to drive the Jews bag and baggage from their midst, unless they desisted from their calumny and their usury and became Christians." Luther said, "we want to practice Christian love toward them and pray that they convert," but also that they are "our public enemies ... and if they could kill us all, they would gladly do so. And so often they do." - Wikipedia
In my perspective Martin Luther was a great reformer and did great early on. I could not follow this man in his latter years, as in the words of his own wife, he had become much too rude.