http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=676 gives schedules to NPCs, and http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=1095 increases NPCs combat AI. It causes them to sneak in combat, jump, etc. I hope these are helpful.
I also am in search of a mod. Before I reinstalled my game, I had a silt strider texture replacer. I thought it was by Darknut, but I can't seem to find one by him. I have looked at replacers by Alan, Psymoniser, and Misty Moon, but none are to my liking. If anyone knows of any others, I would like to know.
I feel I should warn that the NPCs in living cities of Vvardenfell teleport from place to place for their schedule, something not very well documented. I had to uninstall it as I didn't fancy NPCS performing disappearing acts in front of me that, plus the in-game dialogue contradicts with the NPCS location, for example say a guy's supposed to be in a pub but he isn't at the moment, I can live with that, even makes it more realistic as finding people isn't that easy in RL. However the thing is that everyone in there is telling me he's right by the bar!! Too immersion breaking for me, these two, but if you can live with them then its brilliant.
NPC enhanced isn't very well documented either, but it sounds promising, does it improve the NPC pathing, ie. you mention jumping, does that mean they can jump over obstacles and chasms? If so that is well impressive, even oblivion characters can't jump as I remember.