I've got the Working titles for each year. As I continue to work on the RP and tweak details, changes will likely occur in the later years of the story.
Year 1: The Lady of the Lake
Year 2: The Order of Morgana
Year 3: The Tale of 3 Wizards
Year 4: The Unexpected Coupe
Year 5: The Dark Plot
Year 6: The Dark Lord Rises
Year 7: The War of the Wizards
Here are the Bios for the OC teachers
Name: Saren Octavius
Background: Before coming to Hogwarts, Saren taught Defense Against the Dark Arts at a Wizarding school in Germany. Normally a Hogwarts teacher would be promoted to Headmaster but Professors Flitwick and Mcgonagall both vouched for his reputation, knowing him from his early years of teaching. He had previously applied to teach History of Magic but Cuthburt Binns would not give up the position without threatening to haunt the school. Saren has been criticized for his dangerous teaching methods but all his former students have come out of his classes with higher marks than students learning from other teachers. Based on news articles, it is known that Saren is well travelled and used his experiences to improve his teaching methods. As Headmaster Saren has attempted to Can Cuthburt Binns several times due to complaints from students and realizing the low popularity of his subject, but each time has ended in disaster. Saren is less motivated by competition and only follows Quidditch and the House Cups as traditions which students, as well as the other teachers value. Saren himself is strictly academically motivated which shows in his lack of interest in replacing teachers for certain extra-curricular activities.
Name: Romilda Evans
Class: Transfiguration, Apparation
Background: As a young Student Romilda often looked up to her older classmate Minerva Mcgonagall who was in her 7th year when Romilda entered Hogwarts. This friendship is partly why Romilda accepted the offer to replace the Professor when she was promoted to Headmaster after the Second Wizarding War. Romilda is known to be strict due to the potential dangerousness of her subjects, though she is always willing to help struggling students. She is shown to have a low tolerance for bullies and will not tolerate a student's lack of respect.
Name: Seraph Almsay
Class: Potions, Occlumancy/Leglimancy
Background: Originally Seraph applied for History of Magic, but was declined, this led him to accept the position of potions which needed filling after the Second Wizarding War. Due to his background, once Saren become Headmaster, the two have attempted to Revive popularity of the subject of History of Magic by Seraph tutoring students in his office when he is not busy with Occlumancy classes. This leads to animosity between Cuthburt Binns and Seraph but has drastically increased the number of students taking N.E.W.T. level courses on the subject, when previously most students dropped the course when they were able.
Name: Ivan Chekov
Background: Born in Russia, Ivan's family moved to England when he was a toddler. Little is known of Ivan's past besides his father being imprisoned in Azkaban. During his time at Hogwarts Ivan was known as the school's wizard chess champion, even besting many skilled adult wizards. Due to his past Ivan went into hiding during the Second Wizarding War but resurfaced shortly after. Due to the large loss of lives at the hands of Voldemort's Death-Eaters a friend suggested Ivan take up a Job in teaching. At first Ivan was an unpopular choice, being rejected by several wizarding schools. It is unknown why Headmaster Mcgonagall finally accepted him after the retirement of Septima Vector. He seems to know Romilda Evans quite well, though their history is never revealed. As a teacher he is strict and no-nonsense, he is notorious for long homework assignments and his biasy against non-Ravenclaw students.
Name: Hohenheim Elric
Background: Hohenheim was born to Jewish Immigrants who fled to England during World War II. During his time in Hogwarts Hohenheim was hailed as a prodigy by most of his peers and even teachers. He was one of the few students who could even transmutate without a circle. After Graduating, Hohenheim fell in love with the daughter of a filmmaker. He enjoyed a brief stint in Germany studying the findings of Hitler's now defunct Thule Society where he also became close with Saren Octavius. This led him to be called on to teach at Hogwarts when Saren became Headmaster. When out of class Hohenheim is friendly to his students and is known to accidentally refer to them as "Son" (Males) or "Sweety" (Girls) but when teaching he is intense and focused. Many Slytherins are shocked that he was sorted into their house since many of them still believe in blood purity, which Hohenheim clearly despises, even openly sticking up for Muggle-Born and Halfblood students when they are bullied by his own Slytherin Students.
I'll be posting the Official RP thread up soon.