The contenders seem to be:
http://skyrim.nexusmods.com/mods/13281 - looks pretty good, but replaces the speech tree, and some of the magic or other effects (arrows) don't appeal to me
http://skyrim.nexusmods.com/mods/4822 - looks interesting, but not entirely fleshed out, ties unarmed into 1H which isn't ideal, and may conflict with other mods
http://skyrim.nexusmods.com/mods/17201 - SKSE mod, damage scales with 1H, doesn't mess with perks
http://skyrim.nexusmods.com/mods/16010 (Unarmed Combat Overhaul) - Script Dragon, ties unarmed to1H with new perks
...and there are a few others that have very few hits or have not been updated for a long time.
Has anybody used any of these? Any opinions?