Harry Potter and the Thaumaturge's Influence

Thomas C Preacher is a first generation wizard born in 1959, went to school at Hogwarts and finished his studies with the the best grades he could muster. When he got out of school he decided to divine his next decisions, which led him to marry Elyse Beaumont a French first generation witch and still following his divination he finally interfered in Albus Dumbledore's plan to groom Harry to be the martyr that vanquished Tom M Riddle. The story begins in the Preacher small manor, as Thomas is now a renowned author and talented Thaumaturge. He made quite the fortune and is educating Harry to be one of the most powerful wizards of his time, and Harry being a bright young man that love to learn as much as he love to practice any physical activity. What can happen now that the story derailed ? This is an AU, the MC is NOT reincarnated and I'll try to change all that I believe is daft which means that I'll take fanon elements that I judge logic and sound while refusing those that are not, the same goes with canon elements as Rowling has made a lot of mistake and took a lot of bad decisions. There will be errors, please point them as this is as much of a writing training as it is a learning exercise for me as I'm not a native English speaker. Also I'll add new chapter when I feel like writing, I'll try to write as much as possible but I cannot in good conscience promise anything.