I have a free write for my essay and I want to write about the history of anime because I am really thankful for anime. I have been reading that the godfather of anime was Osamu Tezuka, but I'm not too sure.
Who is the father or godfather of anime?
Tezuka is considered to be the father of the post-war anime. The concept of anime exists in the early XXth century but there were no real standardization. I think Tezuka was the first ever to define some rule and above rule, the first one to be able to have a mass production as stated here (the conquest of the television)
Moreover, I guess it would also be interesting for you to find out per your favorite genre. For instance, if you like mecha, clearly Tezuka is a name to quote. If you are more into romance, well... once you have found your focus, you can highlight some masters and their productions. Afterwards, you can make the relationship between those productions and you have your history :)
But looking for the father of anime is like looking for the father of science-fiction to me: you can almost say whatever you want as it is pretty hard to define it objectively.
As for your essay, I did some myself when I was a student. My favorite topics were: