A few things, I’m thinking to add some Overlords to a homebrew setting I have, for sure I want to add in influence from the Keeper of Secrets because all of my players have kind of leaned into their own stories and trying to keep secrets from each other in game which has been fun story but also left them with missing pieces to questions that they have; something I think that Overlord would toy with.

I am wondering if folks have built stats for/know of other Overlords besides the two we got in the new Ebberon book, along with stat blocks on their Rakshasa‘s. I was working on modifying the one we had representing a servant of an Overlord but there’s this great community I wanted to tap into as well with these questions! 

Here is a post by Keith himself with a list

It also lists book (if applicable), but its going to be a 3.5 or 4e book. not 5e.

Or you can also use the wiki