I’m currently away from my laptop, so I’m going mostly off memory for now, but it’s pretty basic:

Oblivion Script Extender(OBSE), Blockhead, HGEC body mod, Immersive Weapons, Oblivion Character Overhaul, Better Underwater(removes the fog from outdoor underwater locations), Maskars Oblivion Overhaul, Ultimate Leveling customized to near Vanilla but using the KCAS wheel setting for attribute leveling, LINK, Unofficial Oblivion Patch, a few sub patches for UOP.

If you look up “Oblivion Modding Guide Steam”, that’s the list I pulled from for the base setup.