I tried to make a list once but i keep running into more guards, many are in villages, hamlets or on patrols so it's hard to keep track of them all, any place where there is a list of them all?

Hold guards are nameless random NPCs that respawn if they are ever killed, there's no list of them really beyond http://www.uesp.net/wiki/Skyrim:Guards that outlines some general information and locations of the various guards in Skyrim.