All these mods can be found on the Nexus and since they are only retextures, no esps will be added to your load order.
1. aMidianBorn Book of Silence http://www.nexusmods.com/skyrim/mods/24909/?
Everyone probably uses this mod already because it's awesome. The UNIQUE ITEMS file adds Cabal's textures to the Mace of Molag Bal, Mehrunes' Razor, Volendrung, Saviour's Hide and the Ebony Mail.
2. Daedric Artifacts Skeleton Key Sanguine Rose Wabbajack http://www.nexusmods.com/skyrim/mods/30860/?
This mod includes a retexture for the Skeleton key that in my opinion is more fitting for a Daedric Artifact. The difference in quality isn't that noticable compared to the Hi-Res DLC but it's always nice to have an alternative choice.
3. EcthelionOtW Mage Equipment Overhaul http://www.nexusmods.com/skyrim/mods/40592/?
EcthelionOtW's Mage Equipment Overhaul is another very popular mod that includes retextures of the Sanguine Rose, Skull of Corruption, Wabbajack and Azura's Star/The Black Star. Overwrite the Sanguine Rose and Wabbajack from the previous mod unless you prefer Den987's textures.
4. Noldorian Dawnbreaker http://www.nexusmods.com/skyrim/mods/30291/?
This is a really nice retexture of the Dawnbreaker by the same guy who made Mage Equipment Overhaul.
5. Masque of Clavicus Vile UHD http://www.nexusmods.com/skyrim/mods/37697/?
Since Zalunaya's A Vile Masque mod seems to have disappeared from the Nexus, jacklxohko's retexture of the Masque of Clavicus Vile is my next favourite. Screenshot to follow…
6. Ultra HD Ebony Blade by FrankFamily http://www.nexusmods.com/skyrim/mods/66744/?
I've updated this post to include this mod as it's by far the best retexture of the Ebony Blade on the Nexus (at least that I know of).
The Ring of Hircine, Ring of Namira and the Oghma Infinium are the only Daedric Artifacts not retextured by these 6 mods.
Dawnbreaker from Noldorian Dawnbreaker
Ebony Blade from Ultra HD Ebony Blade
Mace of Molag Bal from aMidianBorn Book of Silence
Mehrunes' Razor from aMidianBorn Book of Silence
Sanguine Rose from EcthelionOtW Mage Equipment Overhaul
Skull of Corruption from EcthelionOtW Mage Equipment Overhaul
Volendrung from aMidianBorn Book of Silence
Wabbajack from EcthelionOtW Mage Equipment Overhaul
Ebony Mail from aMidianBorn Book of Silence
Masque of Clavicus Vile from A Vile Masque
Saviour's Hide from aMidianBorn Book of Silence
Spellbreaker from EcthelionOtW Mage Equipment Overhaul
Azura's Star / The Black Star from EcthelionOtW Mage Equipment Overhaul
Skeleton Key from Daedric Artifacts Skeleton Key Sanguine Rose Wabbajack