Baron of Sigma
I have my own EDGE Mod that had a recent beta [6.51] added for it. EB Doom at http://www.zxdware.net/ebdoom
Level-wise there's not a whole terrible lot of things yet, but in the monsters department, well, if you look at my other topic in this forum on MODs with the most enemy species, you'll see exactly what enemies are listed in the game up to the last beta[more are already planned or already added for the next version]. Also, the next version will allow you to freeze over enemies Hexen-style, which gives it more of a realism factor, and there's even a weapon that HEALS you in this mod.
Anyways, there is also a screenshots section showing some of the monsters from the recent beta in action. Among the monsters types are Doom/Doom2 monsters, All Heretic Monsters, All Hexen monsters[except Stalkers], most Duke3D monsters[which should be all filled for in the next beta], and some Shadow Warrior enemies, and finally you can fight clones of yourself, various other modded Doom/Heretic monsters like Chainsaw Zombiemen, Mini-Missile Sargents, Gold Liches, Maulotaur Ghosts, just to name a few.
Also, Cacodemon Leader helped me with some of the levels and monsters[like he saved me time with adding the DN3D Battlelord and had the sprites he made from him sent to me already, or the Hissy sprites for the Hissy helper type in EB Doom(yes, I did forget to mention Hissy is in EB Doom as well, and he actually fights :D)]