There are a couple of races that you can make as PCs which I have included here, because they are classically considered an enemy race, such as Githyanki and Drow.
Man, this is not a paladin game, what classic enemy races are you talking about. Any race created in the editor can become an enemy only at the request of the player.
Many play as drow, they have other classic enemies
Throughout the majority of D&D's history, Drow, Duergar, and (especially) Githyanki have been presented solely or primarily as evil monster races. Almost every time they appear in a book, adventure, or even D&D computer game, it's as evil monsters. Drow have been cleaned up and normalized the most, of course, mostly due to the popularity of Drizzt and how many people want to play as Drow. But even so, most Drow in most products are just antagonists.