Id also include Apocalypse Gates series by D J Schinhofen who also walks these halls. - that said many say he does nothing but porn tis a lie since it's mostly fade to black. Whilst there is a lot out there it tends to be a touch rough around the edges or over played. (and after checking my kindle i actually have very little erotica...i would have expected more)
So call me weird but most books that are listed as erotic tends to be less the desirable to read. I am not saying they all are but in my experience they tend to be less than polished. There are several great series out there listed under harem. Some of my recent reads are Dungeon Core Gambit Series by Anthony W. Chow, Ascendant Soul by Ken Rivers and Fae Collector by Noah Fox to name a few.