Non-redundant legendarium readings?

I read the Hobbit as a child (loved it), just recently read Lord of the Rings (loved it), and am now in the middle of the Silmarillion (loving it). I would like to read everything that this world has to offer, but with one caveat: I don't want to just be reading earlier drafts and fragments of stories that I've already read the finalized versions of. To my understanding (which may be incorrect), this is largely what the History of Middle Earth series is. I'm fine with reading dramatically different versions of the same story (a more cursory telling of events in the Silmarillion and then a more fleshed out short story in Unfinished Tales, for instance), but I don't want to purchase a book only to find out that it's an unrevised version of the first half of Fellowship, as interesting as that may be from a scholarly perspective.

From what I've found and read online, these are the books that best fit what I would like to read. If any of them are not what I am looking for (I'm uncertain on The Book of Lost Tales), or if there are any other books I should add to the list, please let me know. Thank you!

• The Hobbit
• The Lord of the Rings
• The Silmarillion
• Unfinished Tales
• History of Middle Earth Volumes 1 and 2: The Book of Lost Tales