Newbie help please

Hey folks. I'm recently new to Tolkien books (and loving them).

I've read:
- The Hobbit
- LOTR
- The Silmarillion
- Unfinished Tales
- Tales From The Perilous Realm

I was wondering if there are any other books (written by Tolkien) that I can read regarding middle earth in any way.

Keeping in mind that I'd rather not read about stuff that isn't accurate in regards to the stuff I have already read. For instance; I don't want to read about stuff like how Aragorn's character was originally Trotter the Hobbit, etc. I feel that it would ruin the rest of the books for me.

Any help would be appreciated.

Thanks in advance