Even the Bible is History, at least I received college credit for taking those classes.
I think, honestly, everyone benefits from Language Arts, History, and Science classes. I also think being well-read helps you understand your Bible. For instance, Geography helps you know what happened and where, as well as why those things happened certain ways. Studying Language Arts helps you read your Bible with better comprehension, etc.
You are a minimalist (just me and just my Bible). I know why you are a minimalist when it comes to scripture, but at least recognize study in other disciplines really would help you and I understand the Bible better. You don't have to buy or read commentaries etc. I think some minimalism is okay. A concordance would be a great help. I'd think you at least have one of those in the back of your Bible.