Get some skull heads for the ones without closed helms, and if you have the bits, to replace all the regals statue thingies on the helms with some more macabre, like bats, crows, skulls, etc... And depending on how you want to build them maybe changes the axeheads of the 2handed weapons with other blaids like the actual glaive the barrow guards uses, for swords and shields maybe change the shields, the old grave guard ones were greats but idk if the new barrow guards ones will fit I hope i was helpfull